If 2 = 5, 4 = 18, 6 = 39, 8 = 68, then what is 10 = ?
If 2 = 5, 4 = 18, 6 = 39, 8 = 68, then what is 10 = ?
यदि 2 = 5, 4 = 18, 6 = 39, 8 = 68 तो 10 = ?
Detailed Solution & Logic
Correct Answer:
105
Look for a pattern:
2 → 5
4 → 18
6 → 39
8 → 68
Check relation:
2: $2^2 + 1 = 4 + 1 = 5$
4: $4^2 + 2 = 16 + 2 = 18$
6: $6^2 + 3 = 36 + 3 = 39$
8: $8^2 + 4 = 64 + 4 = 68$
So pattern is:
$n^2 + \frac{n}{2}$
Now for 10:
$10^2 + 5 = 100 + 5 = 105$
Correct answer: 105
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