logical reasoning question answers – Puzzle Duniya http://www.puzzleduniya.com Online Puzzle, Aptitude, Reasoning, GK & Quiz Portal Sat, 11 Nov 2017 08:33:50 +0000 en-US hourly 1 https://wordpress.org/?v=4.9.6 Solve the Puzzle – Enjoy the Maths Fun http://www.puzzleduniya.com/solve-the-puzzle-enjoy-the-maths-fun/ http://www.puzzleduniya.com/solve-the-puzzle-enjoy-the-maths-fun/#respond Thu, 16 Jun 2016 04:07:47 +0000 http://www.puzzleduniya.com/?p=2906 This is not for all the common people, but those who are having a special affinity towards puzzle solving. It’s for those who really love mathematics as their favorite pass time and make them engaged with the magic and mystery of this fun-filled subject.

If you are preparing hard for the competitive exams like IAS, WBCS, CAT, GMAT, SSC-CGL and others, you are the fittest candidate to read this article with time…

Puzzle Image

Below are solved puzzles with logic, which, i bet, will keep you engrossed with it:

Mystery Unfurled 1:

Look at the equation below:

6 + 9 = 81
5 + 8 = 57
4 + 7 = 37
We need to find out the logic behind the whole mathematical riddle. The logic is explained below:

Solution:

Let’s denote the three line of equation as (i), (ii) and (iii)…..

For equation (i),

6 + 9 = 81
Then, 62 + {(6-1)*9} = 36 + {5*9} = 36 + 45 = 81
For equation (ii),
5 + 8 = 57
Then, 52 + {(5-1)*8} = 25 + {4*8} = 25 + 32 = 57
Similarly For equation (iii),
4 + 7 = 37
the logic is just similar to the above:
Then, 42 + {(4-1)*7} = 16 + {3*7} = 16 + 21 = 37

The whole logic is explained in the Video as below:


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Mystery Unfurled 2:

Look at the below equation:
56 3 49 27 18
74 62 19 8 35
65 92 ? 34 81

You have to find the number that will replace the “?” mark above….

Solution:

Let’s denote the three line of equation as (i), (ii) and (iii)…..
For equation (i), 56 3 49 27 18
If we add all the digits of the 1st line of equation,
we get (5 + 6 + 3 + 4 + 9 + 2 + 7 + 1 + 8) = 45
For equation (ii), 74 62 19 8 35
adding all the digits,
we get (7 + 4 + 6 + 2 + 1 + 9 + 8 + 3 + 5) = 45
Similarly,
For equation (iii), we need to get the sum value equal to 45.
So the logic should be (6 + 5 + 9 + 2 + ? + 3 + 4 + 8 + 1 ) = 45
Then, 38 + ? = 45
So, ? = (45 – 38) = 7
So, ? = 7.

The whole logic is explained in the Video as below:

————————————————————————————————————————-

Mystery Unfurled 3:

Look at the equation below:

4 + 7 + 2 = 281435
7 + 3 + 9 = 212781
6 + 2 + 7 = 121456
2 + 8 + 5 = 164036
8 + 4 + 6 = ??????
You have to find the number that will replace the “??????” mark above….

Solution:

Let’s denote the three line of equation as (i), (ii) and (iii), (iv) and (v)…..

The logic is discussed below for equation (i):

4 + 7 + 2 = 281435
(4 * 7) = 28 and (7 * 2) = 14. Now putting the values together it gives 2814
Now (4 – 1) = 3. If we put the digit together with 2814, we get 28143
Now (4 + 7 + 2) + 2 = 15 and now taking the last digit of the number ’15’ and keeping together with the number 28143, the final number ‘281435’ is ready.

The logic is discussed below for equation (ii):
7 + 3 + 9 = 212781
(7 * 3) = 21 and (3* 9) = 27. Now putting the values together it gives 2127
Now (7 + 1) = 8. If we put the digit together with 2127, we get 21278
Now (7 + 3 + 9) + 2 = 21 and now taking the last digit of the number ’21’ and keeping together with the number 28143, the final number ‘212781’ is ready.

The logic is discussed below for equation (iii):
6 + 2 + 7 = 121456
(6 * 2) = 12 and (2* 7) = 14. Now putting the values together it gives 1214
Now (6 – 1) = 5. If we put the digit together with 1214, we get 12145
Now (6 + 2 + 7) + 1 = 16 and now taking the last digit of the number ’16’ and keeping together with the number 12145, the final number ‘121456’ is ready.

The logic is discussed below for equation (iv):
2 + 8 + 5 = 164036
(2 * 8) = 16 and (8* 5) = 40. Now putting the values together it gives 1640
Now (2 + 1) = 3. If we put the digit together with 1640, it gives 16403
Now (2 + 8 + 5) + 1 = 16 and now taking the last digit of the number ’16’ and keeping together with the number 16403, the final number ‘164036’ is ready.

If we put the similar logic for equation (v), we get:

8 + 4 + 6 =>
(8 * 4) = 32 and (4* 6) = 24. Now putting the values together it gives 3224
Now (8 – 1) = 7. If we put the digit together with 3224, it gives 32247
Now (8 + 4 + 6) + 2 = 20 and now taking the last digit of the number ’20’ and keeping together with the number 32247, the final number ‘322470’ is ready.

Alternatively,

(8 + 4 + 6) + 1 = 19 and now taking the last digit of the number ’19’ and keeping together with the number 32247, the final number ‘322479’ is ready.

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Syllogism – Questions and Answers for Competitive Examinations http://www.puzzleduniya.com/syllogism-questions-and-answers-for-competitive-examinations/ http://www.puzzleduniya.com/syllogism-questions-and-answers-for-competitive-examinations/#respond Mon, 08 Feb 2016 15:06:25 +0000 http://www.puzzleduniya.com/?p=2474 Are you dreaming to make your career in Banking sectors? Are you preparing for different categories of banking exams including IBPS, Bank PO, Clerical exams and other posts? Then you must include ‘assertion and reasoning’ in your exam course and study hard this chapter, because you must face a lot of challenging questions from this particular section during the exam hours. It’s alternatively called ‘Syllogism’, which is a very important part of your logical reasoning or verbal to non-verbal ability tests.

Syllogism Study Hard

Below, 20 questions with their justified explanations are given. Try to solve them very carefully and memorize properly, so that you could easily face the hurdle and successfully overcome them.

In each question below, there are two statements labelled as Assertion (A) and Reason (R).
Share your answer as per below provided codes:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false
(d) A is false but R is true
(e) Both A and R are false.

1. Assertion (A): Plaster of Paris is used by doctors for setting fractured bones.
Reason (R): When Plaster of Paris is mixed with water and applied around the fractured limbs, it sets into a hard mass.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

Plaster of Paris when mixed with water and applied around the fractured limbs, it sets into a hard mass and keeps the bone joints in a fixed position. So, it can be used for setting fractured bones.

2. Assertion (A): The use of chlorofluorocarbons is banned throughout the world now-a-days.
Reason (R): This chemicals caused skin cancer.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

The use of chlorofluorocarbons is banned nowadays because these cause holes in the ozone layer through which ultraviolet rays penetrate and may cause skin cancer.

3. Assertion (A): Bronze is used for making statues.
Reason (R): Bronze is an alloy of copper and tin.

Answer

Answer

Both A and R are true but R is not the correct explanation of A.

Explanation

Explanation

Bronze is an alloy of copper and tin. It’s resistant to corrosion and so it’s used to make statues.

4. Assertion (A): India is facing the problem of inflation.
Reason (R): We have failed to check the black money.

Answer

Answer

Both A and R are true but R is not the correct explanation of A.

Explanation

Explanation

Inflation in India is caused by unrestricted growth of black money.

5. Assertion (A): Leaves of plants are green.
Reason (R): Plants contain chromoplasts, the green pigment.

Answer

Answer

A is true but R is false.

Explanation

Explanation

Leaves of plants are green because they contain the green pigment, chlorophyll. However, plants contain chromoplasts but they are not green pigments.

6. Assertion (A): Areas near the Equator receive rainfall throughout the year.
Reason (R): High temperature and high humidity cause conventional rain in most afternoons near the Equator.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

R is the correct explanation of A.toggle]

7. Assertion (A): Telephone wires sag more in summer.
Reason (R): They expand due to summer heat.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

The metal of telephone wires expands in summer.

8. Assertion (A): Eskimos reside in igloos.
Reason (R): No other material except snow is available.

Answer

Answer

A is true but R is false.

Explanation

Explanation

Eskimos live in snow houses called igloos because snow, being a bad conductor of heat, these houses are warm inside./toggle]

9. Assertion (A): India is a democratic country.
Reason (R): India has a constitution of it’s own.

Answer

Answer

Both A and R are true but R is not the correct explanation of A.

Explanation

Explanation

India is a democratic country because it’s Government is the Government of the people, for the people and by the people. It’s also true that India has its own Constitution.

10. Assertion (A): Pressure cookers are fitted with ebonite handles.
Reason (R): Ebonite is strong.

Answer

Answer

A is true but R is false.

Explanation

Explanation

The handles of pressure cookers are made of ebonite bbecause it being a bad conductor of heats, doesn’t heat up.

11. Assertion (A): Water kept in earthen pots gets cooled in summer.
Reason (R): Evaporation caused cooling.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

Earthen pots have pores through which water evaporates, causing cooling.

12. Assertion (A): Safety fuses are made up of materials having a high melting point.
Reason (R): Safety fuses should be resistant to electric current.

Answer

Answer

Both A and R are false.

Explanation

Explanation

Safety fuses are made up of materials having a low melting point so that when excess current flows through the circuit, the fuse melts breaking the circuit and thus prevents appliances.

13. Assertion (A): Pluto is the coldest planet.
Reason (R): It receives slanting rays of the sun.

Answer

Answer

A is true but R is false.

Explanation

Explanation

Pluto, being farthest from the Sun, hardly gets the sun’s rays. So, Pluto is the coldest planet.

14. Assertion (A): In the upper course, the main work of the river is erosion.
Reason (R): River flows swiftly in the upper course.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

In it’s upper course, the river rushes down a steep slope and so flows swiftly, causing mainly erosion in the region.

15. Assertion (A): Most of the ancient civilization grew near the rivers.
Reason (R): The main occupation of man was agriculture.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

Most ancient civilizations grew near the rivers, because of fertile land and availability of water necessary for agriculture, the main occupation of man.

16. Assertion (A): Earth is the only planet known to have life.
Reason (R): Earth has an atmosphere which is a mixture of oxygen, nitrogen and carbon dioxide.

Answer

Answer

Both A and R are true but R is not the correct explanation of A.

Explanation

Explanation

Presence of water is the chief originator and sustainer of life on the Earth.

17. Assertion (A): Passengers in a boat are not allowed to stand.
Reason (R): This may rise the center of gravity of the boat and the boat may topple over due to unstable equilibrium.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

R fully explains A.

18. Assertion (A): Mercury is the farthest planet from the Sun.
Reason (R): Mercury is the smallest planet in the entire solar system.

Answer

Answer

A is false but R is true.

Explanation

Explanation

Mercury is the smallest planet, but Pluto is the farthest planet in the solar system..

19. Assertion (A): Venus is placed distant from Sun as compared to Mercury , yet it is the hottest planet.
Reason (R): Immense carbon dioxide in the atmosphere of Venus creates a green house effect.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

97% of Venus’ atmosphere comprises of carbon dioxide which traps the incoming solar energy very efficiently.

20. Assertion (A): Akbar founded Din-e-Ilahi.
Reason (R): He was motivated by self-glorification.

Answer

Answer

A is true but R is false.

Explanation

Explanation

Akbar founded Din-e-Ilahi to inculcate moral values in people and abolish religious intolerance. R is false.
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Interesting Syllogism Questions and Answers for IBPS Bank PO Exams http://www.puzzleduniya.com/interesting-syllogism-questions-and-answers-for-ibps-bank-po-exams/ http://www.puzzleduniya.com/interesting-syllogism-questions-and-answers-for-ibps-bank-po-exams/#respond Thu, 04 Feb 2016 05:43:27 +0000 http://www.puzzleduniya.com/?p=2480 The Syllogism test of logical reasoning is given as a practice set to test your merit and analytical power to draw a definite conclusion. If your mind is sharp enough, then you could easily derive the answer in assertive ways. Are you preparing for you management Aptitude Test (M.A.T) or other banking exams like IBPS? Then questions from this section is must during the examination. So, prepare hard to get the taste of success.

IBPS-Tree

Source

Below are given 20 questions from assertion and reasoning questions with their suitable answers. Try to solve them yourselves and once you could do it successfully, your chance of being passed the exams will be far easier.

In each question below, there are two statements labelled as Assertion (A) and Reason (R).

Share your answer as per below provided codes:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false
(d) A is false but R is true
(e) Both A and R are false.

Q1. Assertion (A): On the equinoxes, the day and night are equal all over the globe
Reason (R): On the equinoxes, the position of earth with respect to the sun is such that neither pole is inclined towards the sun.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

R fully and clearly explains A.

Q2. Assertion (A): A person with blood group O is considered a universal recipient.
Reason (R): Type O blood doesn’t contain any antigens.

Answer

Answer

A is false but R is true

Explanation

Explanation

Group O blood carries no antigens on their cells and do not manufacture antibodies against other blood types. This blood can be safely administered to people with other blood groups. So, group O people are called universal donors. A person with blood group AB is universal recipient.

Q3. Assertion (A): Tides indicate the regular and periodic rise and fall in sea level.
Reason (R): Tides are caused by the gravitational pull of the moon and the sun.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

R fully and clearly explains A.

Q4. Assertion (A): The steam engine was invented by James Watt.
Reason (R): There was a problem of taking out water from flooded mines.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

The problem of pumping of water from the flooded mines provided the need of a self-working engine, which led James Watt to invent the same.

Q5. Assertion (A): Increase in carbon dioxide would melt polar ice.
Reason (R): Global temperature would rise.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

The carbon dioxide evapourates in earth’s atmosphere traps the heat. With increase in the proportion of carbon dioxide, therefore, the global temperature would rise, thus causing the polar ice to melt.

Q6. Assertion (A): Tamil Nadu gets most of the rainfall in the winter.
Reason (R): Tamil Nadu gets most of the rainfall from retreating monsoons.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

Rainfall in Tamil Nadu is caused by the retreating monsoons which occurs in winter.

Q7. Assertion (A): Graphite is slippery and used as lubricant.
Reason (R): Graphite has free electrons.

Answer

Answer

Both A and R are true but R is not the correct explanation of A.

Explanation

Explanation

Graphite possesses a layer structure with two successive layers held by weak forces and able to slide over one other. So, graphite is slippery and this property finds its use as a lubricant. In Graphite each carbon atom is linked to three other carbon atoms while one electron in the carbon atom is delocalized. So, graphite has free electrons.

Q8. Assertion (A): In India, the judiciary is independent of the executive.
Reason (R): Judiciary favors the government and helps in the implementation of it’s plans.

Answer

Answer

A is true but R is false

Explanation

Explanation

In India, the judiciary is completely independent of the executive. It has no interference in the affairs of the state nor can it be influenced by the government.

Q9. Assertion (A): We prefer to wear white clothes in winter.
Reason (R): White clothes are good reflectors of heat.

Answer

Answer

A is false but R is true

Explanation

Explanation

We prefer to wear dark clothes in winter because they absorb the heat and keep the body warm. However, white clothes are good reflectors of heat and are worn in summer.

Q10. Assertion (A): In India, people elect their own representatives.
Reason (R): India is a democratic country.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

India, being a democracy, it’s a government run by the representatives elected by its people.

Q11. Assertion (A): Vaccines prevent diseases.
Reason (R): Vaccines must be given to children.

Answer

Answer

Both A and R are true but R is not the correct explanation of A.

Explanation

Explanation

Vaccines prevent diseases by developing immunity inside the body and vaccines must be given to children to build in them a resistance against diseases.

Q12. Assertion (A): Downpour of rain lessens the humidity in the atmosphere.
Reason (R): Rains are caused when atmosphere cannot hold more moisture.

Answer

Answer

A is false but R is true

Explanation

Explanation

Rains are caused when the atmosphere in upper reaches cannot hold more water. But the downpour of rain increases the humidity in the atmosphere near the earth surface.

Q13. Assertion (A): Unpolished rice should be eaten.
Reason (R): Polished rice lacks Vitamin B.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

The husk of unpolished rice contains Vitamin B1, deficiency of which causes the diseases Beri-beri. So, rice should be eaten unpolished.

Q14. Assertion (A): Bats can fly in the night.
Reason (R): Bats emit ultrasonic.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

Bats can fly in the night because they can trace the obstacle in the path by perceiving the echo of the ultrasonic sound emitted by them after it’s reflected by the obstacles.

Q15. Assertion (A): Razia Sultan was the daughter of Iltutmish
Reason (R): Iltutmish was a rebel.

Answer

Answer

A is true but R is false

Explanation

Explanation

Iltutmish was a ruler of slave dynasty and Razia was his daughter.

Q16. Assertion (A): Silver is not used to make electric wires.
Reason (R): Silver is a bad conductor.

Answer

Answer

A is true but R is false

Explanation

Explanation

Silver is a good conductor of electricity but it’s not used to make electric wires because it’s expensive.

Q17. Assertion (A): Gandhiji withdrew the non-cooperation movement.
Reason (R): There was violence at the Chauri Chaura outrage.

Answer

Answer

Both A and R are true and R is the correct explanation of A.

Explanation

Explanation

Gandhiji withdrew the non-cooperation movement because of the violence in the Chauri Chaura outrage.

Q18. Assertion (A): Carbon forms the largest number of compounds.
Reason (R): Carbon has the catenation property.

Answer

Answer

A is false but R is true

Explanation

Explanation

Carbon forms a very large number of compounds due to it’s tendency to form chains and rings of varying sizes, called its catenation property. However, the largest amount of compounds are formed by hydrogen.

Q19. Assertion (A): Uttar Pradesh is called the ‘Sugar Bowl’ of India.
Reason (R): Uttar Pradesh is the leading producer of sugarcane.

Answer

Answer

Both A and R are true and R is the correct explanation of A

Explanation

Explanation

Uttar Pradesh, being the leading producer of sugarcane in India, is called the ‘Sugar Bowl’ of India.

Q20. Assertion (A): When the bus starts, the person inside it falls forward.
Reason (R): The bus pushes the man forward.

Answer

Answer

Both A and R are false.

Explanation

Explanation

When the bus starts, the person inside it falls backward because the bus moves forward but due to the property of inertia, the men tend to be in the initial state of rest.
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