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Question : Directions: Which two numbers should be interchanged to make the given equation correct?
4 × 2 – 3 + 5 = 7

Option 1: 3 and 4

Option 2: 4 and 5

Option 3: 7 and 5

Option 4: 2 and 7


Team Careers360 20th Jan, 2024
Answer (1)
Team Careers360 25th Jan, 2024

Correct Answer: 3 and 4


Solution : Given:
4 × 2 – 3 + 5 = 7

Let's check the options –
First option: 3 and 4
3 × 2 – 4 + 5 = 7
6 – 4 + 5 = 7
7 = 7 (L.H.S. = R.H.S.)
Second option: 4 and 5
5 × 2 – 3 + 4 = 7
10 – 3 + 4 = 7
11 ≠ 7
Third option: 7 and 5
4 × 2 – 3 + 7 = 5
8 – 3 + 7 = 5
12 ≠ 7
Fourth option: 2 and 7
4 × 7 – 3 + 5 = 2
28 – 3 + 5 = 2
30 ≠ 2

So, by interchanging 3 and 4 equation becomes equal. Hence, the first option is correct.

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