831 is to 25 as 731 is to ______?
- 22
- 25
- 21
- 18
Explanation
831 → 25
731 → ?
Break down 831:
- 8 + 3 + 1 = 12
- 8 × 3 × 1 = 24
- Try 12 + 13 = 25 (but 13 seems arbitrary)
Try another approach:
- 8² + 3² + 1² = 64 + 9 + 1 = 74 → Not 25
- (8 × 3) + 1 = 24 + 1 = 25
Pattern found:
→ (First digit × Second digit) + Third digit
Now apply same logic to 731:
→ 7 × 3 = 21
→ 21 + 1 = 22
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