Question : Directions: Which of the following interchange of signs would make the given equation correct?
28 – 7 + 2 × 2 = 0

Option 1: Change + into ×

Option 2: Change × into +

Option 3: Change – into +

Option 4: Change + into –


Team Careers360 19th Jan, 2024
Answer (1)
Team Careers360 25th Jan, 2024

Correct Answer: Change + into ×


Solution : Given:
28 – 7 + 2 × 2 = 0

Replace the given symbols in the options one by one with the original symbols in the given equation.
First option: Change + into ×
= 28 – 7 × 2 × 2
= 28 – 28
= 0
Second option: Change × into +
= 28 – 7 + 2 + 2
= 28 – 7 + 4
= 28 – 3
25 ≠ 0
Third option: Change – into +
= 28 + 7 + 2 × 2
= 28 + 7 + 4
= 28 + 11
39 ≠ 0
Fourth option: Change + into –
= 28 – 7 – 2 × 2
= 28 – 7 – 4
= 28 – 11
17 ≠ 0

Here, only the first option satisfies the R.H.S. of the given equation. Hence, the first option is correct.

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