Question : Find the wrong number in the following number series: 3, 7, 16, 35, 70, 153.
Option 1: 70
Option 2: 16
Option 3: 153
Option 4: 35
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Correct Answer: 70
Solution :
Given series: 3, 7, 16, 35, 70, 153
Logic:
3, 3 × 2 + 1 = 7, 7 × 2 + 2 = 16, 16 × 2 + 3 = 35, 35 × 2 + 4 ≠ 70
Here, the fifth term breaks the rule, So the wrong number in the series is 70.
In place of 70, it should be = 35 × 2 + 4 = 74.
Then only next term = 74 × 2 + 5 = 153.
Therefore, the wrong number in the given series is 70.
Hence, the correct answer is 70.
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