Question : Direction: In this question, some equations are solved on the basis of a certain system. On the same basis find out the four alternatives for the unsolved equation.
If 56 × 11 = 9, 37 × 13 = 6, 42 × 12 = 3, then find the value of 87 × 77 = ?
Option 1: 1
Option 2: 2
Option 3: 3
Option 4: 4
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Correct Answer: 1
Solution : Given:
56 × 11 = 9, 37 × 13 = 6, 42 × 12 = 3, 87 × 77 = ?
Like, 56 × 11 ⇒ (5 + 6) – (1 + 1) = 11 – 2 = 9 .
37 × 13 = 6 ⇒ (3 + 7) – (1 + 3) = 10 – 4 = 6 .
42 × 12 ⇒ (4 + 2) – (1 + 2) = 6 – 3 = 3 .
Similarly, 87 × 77 ⇒ (8 + 7) – (7 + 7) = 15 – 14 = 1.
Hence, the first option is correct.
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