[A]. 61
[B]. 71
[C]. 73
[D]. 81
✅ The correct answer is option D.
Each of the numbers except 81 is a prime number.
Each of the numbers except 81 is a prime number.
Aptitude
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12. Find out the wrong number in the given sequence of numbers.: 4, 6, 8, 9, 10, 11, 12
[A]. 10
[B]. 11
[C]. 12
[D]. 9
✅ The correct answer is option B.
Each number is a composite number except 11.
Each number is a composite number except 11.
13. Find out the wrong number in the series.: 40960, 10240, 2560, 640, 200, 40, 10
[A]. 640
[B]. 40
[C]. 200
[D]. 2560
✅ The correct answer is option C.
Go on dividing by 4 to get the next number.
So, 200 is wrong.
Go on dividing by 4 to get the next number.
So, 200 is wrong.
14. Insert the missing number.: 2, 4, 12, 48, 240, (….)
[A]. 960
[B]. 1440
[C]. 1080
[D]. 1920
✅ The correct answer is option B.
Go on multiplying the given numbers by 2, 3, 4, 5, 6.
So, the correct next number is 1440.
Go on multiplying the given numbers by 2, 3, 4, 5, 6.
So, the correct next number is 1440.
15. Insert the missing number.: 5, 10, 13, 26, 29, 58, 61, (….)
[A]. 122
[B]. 64
[C]. 125
[D]. 128
✅ The correct answer is option A.
Numbers are alternatively multiplied by 2 and increased by 3.
So, the missing number = 61 x 2 = 122.
Numbers are alternatively multiplied by 2 and increased by 3.
So, the missing number = 61 x 2 = 122.
16. Find out the wrong number in the given sequence of numbers.: 36, 54, 18, 27, 9, 18.5, 4.5
[A]. 4.5
[B]. 18.5
[C]. 54
[D]. 18
✅ The correct answer is option B.
The terms are alternatively multiplied by 1.5 and divided by 3. However, 18.5 does not satisfy it.
The terms are alternatively multiplied by 1.5 and divided by 3. However, 18.5 does not satisfy it.
17. Find out the wrong number in the series.: 1, 1, 2, 6, 24, 96, 720
[A]. 720
[B]. 96
[C]. 24
[D]. 6
✅ The correct answer is option B.
Go on multiplying with 1, 2, 3, 4, 5, 6 to get next number.
So, 96 is wrong.
Go on multiplying with 1, 2, 3, 4, 5, 6 to get next number.
So, 96 is wrong.
18. Find out the wrong number in the series.: 445, 221, 109, 46, 25, 11, 4
[A]. 221
[B]. 109
[C]. 46
[D]. 25
✅ The correct answer is option C.
Go on subtracting 3 and dividing the result by 2 to obtain the next number.
Clearly, 46 is wrong.
Go on subtracting 3 and dividing the result by 2 to obtain the next number.
Clearly, 46 is wrong.
19. Insert the missing number.: 8, 24, 12, 36, 18, 54, (….)
[A]. 27
[B]. 108
[C]. 68
[D]. 72
✅ The correct answer is option A.
Numbers are alternatively multiplied by 3 and divided by 2.
So, the next number = 54 ÷ 2 = 27.
Numbers are alternatively multiplied by 3 and divided by 2.
So, the next number = 54 ÷ 2 = 27.
20. Insert the missing number.: 8, 7, 11, 12, 14, 17, 17, 22, (….)
[A]. 27
[B]. 20
[C]. 22
[D]. 24
✅ The correct answer is option B.
There are two series (8, 11, 14, 17, 20) and (7, 12, 17, 22) increasing by 3 and 5 respectively.
There are two series (8, 11, 14, 17, 20) and (7, 12, 17, 22) increasing by 3 and 5 respectively.