In the following question, select the related number from the given alternatives.
8 : 81 : : ? : 64
- AOption (a)
3
- BOption (b)
8
- COption (c)
7
- DOption (d)
9
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Correct answer
7
Why this answer is correct
The pattern followed here is:
Logic: (1st number + 1)2 = 2nd number.
So, 8 : 81
→ (8 + 1)2 = 92 = 81.
Similarly, ? : 64
→ (7 + 1)2 = 82 = 64.
Hence, the correct answer is "Option 3".

















