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If 3 × 4 = 21; 4 × 5 = 36; 5 × 6 = 55, then find 6 × 7.1. 912. 673. 424. 78 |
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Answer» Correct Answer - Option 4 : 78 3 × 4 = 21; 4 × 5 = 36; 5 × 6 = 55 See the pattern 3 × (3 + 4) = 21 ⇒ 3 × 7 = 21 ⇒ 21 = 21 (satisfied) Similarly, 4 × 5 = 36 ⇒ 4 × (4 + 5) = 36 ⇒ 4 × 9 = 36 ⇒ 36 = 36 (satisfied) Similarly, 5 × 6 = 55 ⇒ 5 × (5 + 6) = 55 ⇒ 5 × 11 = 55 ⇒ 55 = 55 (satisfied) Similarly, 6 × 7 ⇒ 6 × (6 + 7) ⇒ 6 × 13 ∴ Required value is 78 |
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