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Question : Directions: What will come in the place of the question mark (?) in the following equation if + and – are interchanged and × and ÷ are interchanged?
42 × 7 ÷ 12 – 77 + 13 = ?

Option 1: 140

Option 2: 131

Option 3: 136

Option 4: 134


Team Careers360 1st Jan, 2024
Answer (1)
Team Careers360 20th Jan, 2024

Correct Answer: 136


Solution : Given:
42 × 7 ÷ 12 – 77 + 13 = ?

If + and – are interchanged and × and ÷ are interchanged then the equation will be as follows –
= 42 ÷ 7 × 12 + 77 – 13
= 6 × 12 + 77 – 13
= 72 + 77 – 13
= 149 – 13
= 136

Here, only the third option satisfies the given equation. Hence, the third option is correct.

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