Question : Directions: By Interchanging the given two numbers which of the following equations will be not correct?
8 and 2
I. 8 × 4 – 6 ÷ 3 + 2 = 14
II. 6 – 8 × 3 + 2 ÷ 1 = 9
Option 1: Only I
Option 2: Neither I nor II
Option 3: Only II
Option 4: Both I and II
Correct Answer: Only II
Solution :
Given:
8 and 2 are interchanged –
I. 8 × 4 – 6 ÷ 3 + 2 = 14
II. 6 – 8 × 3 + 2 ÷ 1 = 9
For equation I –
After interchanging the given numbers, we get –
⇒ 2 × 4 – 6 ÷ 3 + 8
⇒ 2 × 4 – 2 + 8
⇒ 8 – 2 + 8
⇒ 14
For equation II –
After interchanging the given numbers, we get –
⇒ 6 – 2 × 3 + 8 ÷ 1
⇒ 6 – 2 × 3 + 8
⇒ 6 – 6 + 8
⇒ 8 ≠ 9
So, only equation II doesn't give the required answer. Hence, the third option is correct.
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