Aptitude - Page 4 of 14

31. Insert the missing number.: 3, 7, 6, 5, 9, 3, 12, 1, 15, (….)

September 6, 2025 by Admin

[A]. 18

[B]. 13

[C]. -1

[D]. 3

✅ The correct answer is option C.
There are two series, beginning respectively with 3 and 7. In one 3 is added and in another 2 is subtracted.
The next number is 1 – 2 = -1.

32. Find the odd man out.: 3, 5, 7, 12, 17, 19

September 6, 2025 by Admin

[A]. 19

[B]. 17

[C]. 5

[D]. 12

✅ The correct answer is option D.
Each of the numbers is a prime number except 12.

33. Find the odd man out.: 16, 25, 36, 72, 144, 196, 225

September 6, 2025 by Admin

[A]. 36

[B]. 72

[C]. 196

[D]. 225

✅ The correct answer is option B.
Each of the numbers except 72 is a perfect square.

34. Find the odd man out.: 2, 5, 10, 17, 26, 37, 50, 64

September 6, 2025 by Admin

[A]. 50

[B]. 26

[C]. 37

[D]. 64

✅ The correct answer is option D.
(1*1)+1 , (2*2)+1 , (3*3)+1 , (4*4)+1 , (5*5)+1 , (6*6)+1 , (7*7)+1 , (8*8)+1
But, 64 is out of pattern.

35. Find the odd man out.: 835, 734, 642, 751, 853, 981, 532

September 6, 2025 by Admin

[A]. 751

[B]. 853

[C]. 981

[D]. 532

✅ The correct answer is option A.
In each number except 751, the difference of third and first digit is the middle one.

36. Find out the wrong number in the series.: 19, 26, 33, 46, 59, 74, 91

September 6, 2025 by Admin

[A]. 26

[B]. 33

[C]. 46

[D]. 59

✅ The correct answer is option B.
Go on adding 7, 9, 11, 13, 15, 17 respectively to obtain the next number.
So, 33 is wrong. It must be 35

37. Find the odd man out.: 1, 4, 9, 16, 20, 36, 49

September 6, 2025 by Admin

[A]. 1

[B]. 9

[C]. 20

[D]. 49

✅ The correct answer is option C.
The pattern is 12, 22, 32, 42, 52, 62, 72. But, instead of 52, it is 20 which to be turned out.

38. Find out the wrong number in the given sequence of numbers.: 25, 36, 49, 81, 121, 169, 225

September 6, 2025 by Admin

[A]. 36

[B]. 49

[C]. 121

[D]. 169

✅ The correct answer is option A.
The numbers are squares of odd natural numbers, starting from 5 up to 15.
So, 36 is wrong.

39. Find out the wrong number in the given sequence of numbers.: 582, 605, 588, 611, 634, 617, 600

September 6, 2025 by Admin

[A]. 634

[B]. 611

[C]. 605

[D]. 600

✅ The correct answer is option A.
Alternatively 23 is added and 17 is subtracted from the terms. So, 634 is wrong.

40. Insert the missing number.: 16, 33, 65, 131, 261, (….)

September 6, 2025 by Admin

[A]. 523

[B]. 521

[C]. 613

[D]. 721

✅ The correct answer is option A.
Each number is twice the preceding one with 1 added or subtracted alternatively.
So, the next number is (2 x 261 + 1) = 523.