যদি 7 × 6 = 2824, 2 × 3 = 812, হয় তবে 4 × 5 =?
Solution
Correct Answer: Option B
এখানে,
7 × 4 = 28, 6 × 4 = 28, ∴ 7 × 6 = 2824
2 × 4 = 8, 3 × 4 = 12, ∴ 2 × 3 = 812
একইভাবে,
4 × 4 = 16, 5 × 4 = 20, ∴ 4 × 5 = 1620
7 × 4 = 28, 6 × 4 = 28, ∴ 7 × 6 = 2824
2 × 4 = 8, 3 × 4 = 12, ∴ 2 × 3 = 812
একইভাবে,
4 × 4 = 16, 5 × 4 = 20, ∴ 4 × 5 = 1620
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