Correct Answer - Option 1 : 105
The pattern of the original number series is
⇒ 42
⇒ 42 + (11 × 2) = 64
⇒ 64 + (13 × 2) = 90
⇒ 90 + (17 × 2) = 124
⇒ 124 + (19 × 2) = 162
⇒ 162 + (23 × 2) = 208
According the pattern of the above series the number series starting from the given number would be as:
⇒ 23
⇒ A = 23 + (11 × 2) = 45
⇒ B = 45 + (13 × 2) = 71
⇒ C = 71 + (17 × 2) = 105
⇒ D = 105 + (19 × 2) = 143
⇒ E = 143 + (23 × 2) = 189
∴ The required number in place of ‘C’ would be 105.