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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


Team Careers360 2nd Jan, 2024
Answer (1)
Team Careers360 23rd Jan, 2024

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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