Direction: In each of the following questions, a number series is given in which one number is wrong. You have to find out that number and have to follow the new series which will be started by that number. By following this, which will be the second number of the new series?
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2, 7, 28, 146, 877, 6140
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- 242
- 246
- 252
- 341
- None of these
Correct Option: D
As per the details in the question the series is in the form of
First term = 2
Second term = ( First term × 3 ) + 1
⇒ Second term = ( 2 × 3 ) + 1 = 7
Third term = ( Second term × 4 ) + 1
⇒ Third term = ( 7 × 4 ) + 1 = 28 is wrong , 29 should be sixth term because ( 7 × 4 ) + 1 = 29 .
So 28 is wrong. we get 29 as Third term.
Fourth term = ( Third term × 5 ) + 1
⇒ Fourth term = ( 29 × 5 ) + 1 = 146
Fifth term = ( Fourth term × 6 ) + 1
⇒ Fifth term = ( 146 × 6 ) + 1 = 877
