In the following number series only one number is wrong. Find out the wrong number.
8 11 17 47 128 371 1100
Correct Answer: Option B
In the following number series the pattern we observe is:
Any number = 3 × (previous number) – 13
For example: 11 = (3 × 8) – 13
128 = (3 × 47) – 13
371 = (3 × 128) – 13
1100 = (3 × 371) – 13
But, for 17 we can observe:
17 ≠ (11 × 3) – 13
& 47 ≠ (17 × 3) – 13
∴ 17 is the wrong number.
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