6, 11, 20, 32, 42, 56, 72
Answer: Option [C]
The pattern is 22 + 2, 32 + 3, 42 + 4, 52 + 5, 62 + 6, 72 + 7, 82 + 8
So the wrong number is 32
6, 10, 18, 30, 46, 66, 91, 120
Answer: Option [B]
The pattern is + 4, +8, 12, +16, +20, +24, +30
So the wrong number in the series is 91
In each of the following questions a number series is given. Below the number series a number is given. This number is followed by A, B, C, D and E. Using the same pattern as in the original series answer the questions.
(3) 8 12, 32, 108, 448, 22603 A B C D E
What will be come in place of C ?
Answer: Option [D]
The pattern is x 1 + 4, x 2 + 8, x 3 + 12, x 4 + 16, x 5 + 20
So, 3 x 1 + 4 = 7
So, 7 x 2 + 8 = 22
So, 22 x 3 + 12 = 78
So, 78 x 4 + 16 = 328 which replaces C
6 A B C D E
What will be come in place of D ?
Answer: Option [B]
The pattern is x 1 - 1, x 2 - 2, x 3 - 3, x 4 - 4, x 5 - 5
So, 6 x 1 - 1 = 5
So, 5 x 2 - 2 = 8
So, 8 x 3 - 3 = 21
So, 21 x 4 - 4 = 80 which replaces D
1, 3, 7, 15, ?, 63, 127
Answer: Option [D]
The pattern is
21 - 1 = 1
22 - 1 = 3
23 - 1 = 7
24 - 1 = 15
25 - 1 = 31
26 - 1 = 63
27 - 1 = 127
So, 31 will replace the question mark.