Quantitative Aptitude Ques 1225

Question: Directions: In each of these questions, a number series is given. In each series, only one number is wrong. Find out the wrong number. [SBI (PO) 2011]

2, 8, 12, 20, 30, 42, 56

Options:

A) 8

B) 42

C) 30

D) 20

E) 12

Show Answer

Answer:

Correct Answer: A

Solution:

  • $ 2+4=6\ne 8 $
    $ \Rightarrow $ $ 6+6=12 $ $ 12+8=42 $
    $ \Rightarrow $ $ 20+10=30 $ $ 30+12=42 $
    $ \Rightarrow $ $ 42+14=56 $
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