[Ans] (C)
[Question] What will come in place of the x in the following Number series? 2, 7, 27, 107, 427, x
Options:
(A) 1427
(B) 1607
(C) 1707
(D) 2047
(E) 2147
[CoT] 2
2 × 4 - 1 = 7
7 × 4 - 1 = 27
27 × 4 - 1 = 107
107 × 4 - 1 = 427
427 × 4 - 1 = 1707

[Ans] (D)
[Question] Which one of the following is not a prime number?
Options:
(A) 31
(B) 61
(C) 71
(D) 73
(E) 91
[CoT] 91 is divisible by 7. So, it is not a prime number.

[Ans] (C)
[Question]
The salary of a worker is first increased by 30% and afterwards reduced by 30%. What is net change in his salary?
Options:
(A) 910% increase
(B) 10% increase
(C) 9% decrease
(D) 12% decrease
(E) 15% increase
[CoT] (30 * 30)/100 = 9% decrease