Question : Directions: By Interchanging the given two numbers which of the following equations will be not correct?
9 and 7
I. 7 × 3 – 8 + 4 + 9 = 32
II. 7 – 9 × 2 + 6 ÷ 3 = –3

Option 1: Only II

Option 2: Neither I nor II

Option 3: Both I and II

Option 4: Only I


Team Careers360 22nd Jan, 2024
Answer (1)
Team Careers360 25th Jan, 2024

Correct Answer: Only II


Solution : Given:
9 and 7 are interchanged.
I. 7 × 3 – 8 + 4 + 9 = 32
II. 7 – 9 × 2 + 6 ÷ 3 = –3

Let's solve each equation –
I. 9 × 3 – 8 + 4 + 7 = 32
= 27 – 3
= 24 ≠ 32
II. 9 – 7 × 2 + 6 ÷ 3 = –3
= 9 – 7 × 2 + 2
= 9 – 14 + 2
= –3 = R.H.S.

So, only the second equation is correct. Hence, the first option is correct.

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