Question

Find the wrong number in the given series. 3, 7, 16, 35, 70, 153

Answer 1

The series →

3 , 7 , 16 , 35 , 70 , 153

It's like that+

3 , 3(2)+1 = 7 , 7(2)+2 = 16 , 16(2)+3 = 35 , 35(2)+4 ≠ 70

Here , fifth term breaks the rule , So wrong number in series is 70.

In place of 70 it should be →

35(2) + 4 = 74
Then only next term →
74(2)+5 = 153

Answer→ The wrong number in given series is 70.
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Answer 2

The given series is 3 , 7 , 16 , 35 , 70 , 153 
3 , 3(2)+1 = 7 , 7(2)+2 = 16 , 16(2)+3 = 35 , 35(2)+4 ≠ 70 

We can see that the fifth term doesnot fall under the sequence 

∴So wrong number in series is 70.