51. Find the odd man out.: 10, 25, 45, 54, 60, 75, 80
[A]. 10
[B]. 45
[C]. 54
[D]. 75
✅ The correct answer is option C.
Each of the numbers except 54 is multiple of 5.
Each of the numbers except 54 is multiple of 5.
series
52. Insert the missing number.: 4, -8, 16, -32, 64, (….)
[A]. 128
[B]. -128
[C]. 192
[D]. -192
✅ The correct answer is option B.
Each number is the proceeding number multiplied by -2.
So, the required number is -128.
Each number is the proceeding number multiplied by -2.
So, the required number is -128.
53. Find out the wrong number in the series.: 3, 7, 15, 27, 63, 127, 255
[A]. 7
[B]. 15
[C]. 27
[D]. 63
✅ The correct answer is option C.
Go on multiplying the number by 2 and adding 1 to it to get the next number.
So, 27 is wrong.
Go on multiplying the number by 2 and adding 1 to it to get the next number.
So, 27 is wrong.
54. Insert the missing number.: 10, 5, 13, 10, 16, 20, 19, (….)
[A]. 22
[B]. 40
[C]. 38
[D]. 23
✅ The correct answer is option B.
There are two series (10, 13, 16, 19) and (5, 10, 20, 40), one increasing by 3 and the other multiplied by 2.
There are two series (10, 13, 16, 19) and (5, 10, 20, 40), one increasing by 3 and the other multiplied by 2.