Question

Find a wrong number in the series:
9, 19, 37, 75, 149, 297.

• A. 75
• B. 37
• C. 19
• D. 149
• E. 297

Answer 1

The correct option is C 19

Clearly the correct sequence is:
$9,2\times 9+1=19;2\times 19-1=37;2\times 37+1=75;2\times 75-1=149;2\times 149+1=299;i.ethelogicis\times 2\pm 1.$
$\therefore$297 is wrong and should be replaced by 299.
Hence, the answer is (c)