Question : Directions: By interchanging the given two signs, which of the following equations will NOT be correct?
+ and ×
l. 180 – 32 + 3 × 148 ÷ 37 = 88
II. 204 ÷ 17 × 23 + 5 – 97 = 50
Option 1: Both I and II
Option 2: Only I
Option 3: Neither I nor II
Option 4: Only II
Correct Answer: Only II
Solution :
Given:
l. 180 – 32 + 3 × 148 ÷ 37 = 88
II. 204 ÷ 17 × 23 + 5 – 97 = 50
Equation I:
180 – 32 × 3 + 148 ÷ 37 = 88
On solving the L.H.S. of the equation –
= 180 – 32 × 3 + 148 ÷ 37
= 180 – 32 × 3 + 4
= 180 – 96 + 4
= 88
Equation II:
204 ÷ 17 + 23 × 5 – 97 = 50
On solving the L.H.S. of the equation –
= 204 ÷ 17 + 23 × 5 – 97
= 12 + 23 × 5 – 97
= 12 + 115 – 97
= 30 ≠ 50
So, the equation II is incorrect. Hence, the fourth option is correct.
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