Direction: In each of the following questions a number series is given. A number is given after the series and then (a), (b), (c), (d) and (e) are given. According to the given series, you have to form a new series which begins with the given number, and then answer the question asked.
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3 12 30 66 138 282 7 (a) (b) (c) (d) (e) Which of the following numbers will come in place of (b) ?
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- 34
- 70
- 46
- 62
- None of these
Correct Option: C
As per the details in the question the series is in the form of
First series :-
First term = 3
Second term = First term × 2 + 6
⇒ Second term = 3 × 2 + 6 = 12
Third term = Second term × 2 + 6
⇒ Third term = 12 × 2 + 6 = 30
similarly , we can find the all others terms .
Second series :-
First term = 7
Second term = First term × 2 + 6
⇒ Second term = 7 × 2 + 6 = 20
Third term = Second term × 2 + 6
⇒ Third term = 20 × 2 + 6 = 46
Hence , the place value of ( b ) is 46 .