Mental Ability - Questions

1 .

Given interchanges : Signs + and - , numbers 4 and 8.

8 - 4 + 12 = 8

4 - 8 + 12 = 0

4 + 8 - 12 = 12

8 + 4 - 12 = 24

Correct Answer : Option (B) - 4 - 8 + 12 = 0

Explanation :

On interchanging + and - and 4 and 8 in (b),

we get the equation as

8 + 4 - 12 = 0

or 12 - 12 = 0

or 0 = 0, which is true.

2 .

In a certain code, MONKEY is written as XDJMNL. How is TIGER written in that code ?

QDFHS

HFDSQ

SHFDQ

RSAFD

Correct Answer : Option (A) - QDFHS

Explanation : The letter of the word are written in a reverse order and then each letter is moved one step backward to obtain the code.

3 .

Two bus tickets from city A to B and three tickets from city A to C cost Rs. 77 but three tickets from city A to B and two tickets from city A to C cost Rs. 73. What are the fares for cities B and C from A ?

Rs. 15, Rs. 14

Rs. 4, Rs. 23

Rs. 13, Rs. 17

Rs. 17, Rs. 13

Correct Answer : Option (C) - Rs. 13, Rs. 17

Explanation :

Let Rs. x be the fare of city B from city A and Rs. y be the fare of city C from city A.

Then, 2x + 3y = 77 ...(i) and

3x + 2y = 73 ...(ii)

Multiplying (i) by 3 and (ii) by 2 and subtracting, we get: 5y = 85 or y = 17.

Putting y = 17 in (i), we get: x = 13.

4 .

If South-East becomes North, North-East becomes West and so on. What will West become?

North-West

North-East

South-East

South-West

Correct Answer : Option (C) - South-East

5 .

What should come in place of question mark (?) in the following number series?

132 156 ? 210 240 272

182

196

199

204

Correct Answer : Option (A) - 182

Explanation :

The given series follows a logic that

11 x 12, 12 x 13, 13 x 14, 14 x 15, 15 x 16,...

So the missing number is 13 x 14 = 182

6 .

Arrange the words given below in a meaningful sequence.

1.Presentation 2.Recommendation 3. Arrival 4.Discussion 5.Introduction

5, 3, 4, 1, 2

5, 3, 1, 2, 4

3, 5, 4, 2, 1

3, 5, 1, 4, 2

Correct Answer : Option (D) - 3, 5, 1, 4, 2

Explanation :

Arrival Introduction Presentation Discussion Recommendation

3 5 1 4 2

7 .

If 'A $ B' means 'A is brother of B', 'A @ B' means 'A is wife of B', 'A #B' means ' A is daughter of B' and 'A * B' means 'A is father of B', then which of the following expressions indicates the relationship 'U is father-in-law of P ?

P@Q$T#W*U

P@Q$T#U*W

P@Q$W*T#U

P@W$Q*T#U

Correct Answer : Option (B) - P@Q$T#U*W

Explanation :

Here the P is the wife of Q who is brother of T who is daughter of U.

That implies P is wife of U's son Q => U is father-in-law of P.

8 .

If it is possible to form a number with the second, the fifth and the eighth digits of the number 31549786, which is the perfect square of a two - digit even number, which of the following will be the second digit of that even number ?

Correct Answer : Option (B) - 4

Explanation :

The 2nd, 5th and 8th digits of the number 31549786 are 1, 9 and 6 respectively.

The perfect square of a two - digit even number, formed using the digits 1, 9 and 6 is 196.

And, 14 x 14 = 196

So, the required even number is 14. Clearly, its second digit is 4.

Hence, the answer is (b).

9 .

If first day of the year(not a leap year) was monday, then what was the last day of the year?

monday

friday

saturday

sunday

Correct Answer : Option (A) - monday

Explanation : If the year is not a leap year, then last day is same as first day

10 .

The product of two successive numbers is 9506.Which is the smaller of the two numbers?

Correct Answer : Option (C) - 97

Explanation :

√9506 = 97.50 So 97 and 98 are the two numbers.

so 97 is the answer

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