Question : Directions: By interchanging the given two signs and numbers which of the following equations will be not correct?
– and ÷, 8 and 2
I. 5 + 7 – 8 × 4 ÷ 2 = 9
II. 3 + 8 × 4 –2 ÷ 1 = 3
Option 1: Neither I nor II
Option 2: Only II
Option 3: Both I and II
Option 4: Only I
Correct Answer: Only I
Solution :
Given:
I. 5 + 7 – 8 × 4 ÷ 2 = 9
II. 3 + 8 × 4 –2 ÷ 1 = 3
After interchanging the signs and numbers the equations are as follows –
I. 5 + 7 ÷ 2 × 4 – 8 = 9
= 5 + 3.5 × 4 – 8
= 5 + 14 – 8
= 11 ≠ 9
II. 3 + 2 × 4 ÷ 8 –1 = 3
= 3 + 1 –1
= 3 = R.H.S.
So, only in the first equation R.H.S. ≠ L.H.S of the given equations. Hence, the fourth option is correct.
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