3100+ Mental Ability Reasoning Questions and Answers with Explanation

Q:

In a row of thirty boys, R is fourth from the right end and W is tenth from the left end . How many boys are there between R and W?

A) 15	B) 16
C) 17	D) can't be determined

Answer & Explanation Answer: B) 16

Explanation:

W = 10th from the left

R = 4th from the right = (30 - 4 + 1= ) 27th from left

No of boys between R and W = (27 - 10) - 1 = 16

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Filed Under: Number, Ranking and Time Sequence Test
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28 14248

Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative

Assertion(A) : An iron ball floats on mercury but gets immersed in water.

Reason (R) : The specific gravity of iron is more than that of mercury.

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.

Answer & Explanation Answer: C) A is true but R is false.

Explanation:

Iron with specific gravity less than that of mercury but more than that of water, floats in the former but gets immersed in the second

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Filed Under: Assertion and Reason

6 14182

Q:

Alpha is to Omega as First is to what?

A) Last	B) Beta
C) Gamma	D) End

Answer & Explanation Answer: A) Last

Explanation:

We know that, ALpha and Omega are the first and last lettrs of in the Greek alphabet. Hence, alpha is to omega as first is to last.

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Filed Under: Alphabet Test
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21 14165

Q:

According to the given Venn diagram, the total number of students in the class is ___.

A) 55	B) 56
C) 53	D) 54

Answer & Explanation Answer: A) 55

Explanation:

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Filed Under: Logical Venn Diagram
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1 14148

Q:

Main street high school has 10 members on its football team and 14 members on its science club. 5 members at the school belong to both the football and science teams. How many students belong to only science club team or football team?

A) 9	B) 14
C) 24	D) 21

Answer & Explanation Answer: A) 9

Explanation:

Given that,

Members in football team = n(f) = 10

Members in science club = n(s) = 14

Members in both football team and science club = n(f ^ s) = 5

Then, Members in only football team = n(F) = 10 - 5 = 5

Members in only science team = n(S) = 14 - 5 = 9

football_science_teams1533013879.jpg image

Hence, members in only football or science team = n(FUS) = n(F) + n(S) - n(f^s)

= 9 + 5 - 5

= 9.

Hence, many students belong to only science club team or football team = 9.

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Filed Under: Logical Venn Diagram
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62 14147

Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative

Assertion (A) : In India, people elect their own representatives.

Reason (R) : India is a democracy.

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.

Answer & Explanation Answer: A) Both A and R are true and R is the correct explanation of A.

Explanation:

India, being a democracy, it is a government run by the representatives elected by its people

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Filed Under: Assertion and Reason

4 14133

Q:

Study the following diagram and answer questions based on it.

The diagram represents the favourite ice-cream flavours of kids in a society.

The ratio of kids who like Vanilla to those who like Chocolate is

A) 12/30	B) 39/45
C) 27/45	D) 39/55

Answer & Explanation Answer: D) 39/55

Explanation:

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Q:

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

1 ÷ 14 x 30 + 20 - 10 = 12

A) - and +	B) ÷ and x
C) x and -	D) + and ÷

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