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The wrong number of the sequence 4, 9, 25, 49, 121, 144 is
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- 144
- 121
- 49
- 4
- 144
Correct Option: A
The pattern of the sequence is :
2² = 4
3² = 9
5² = 25
7² = 49
11² = 121
13² = 169 ≠ 144
From above it is clear that these numbers are squares of first 6 consecutive prime numbers. Hence, 144 should be replaced by 169.
The wrong number of the sequence is 144.
