Question : Directions: Which two signs should be interchanged to make the given equation correct? 192 × 16 + 9 – 8 ÷ 2 = 5
Option 1: × and ÷
Option 2: + and –
Option 3: × and –
Option 4: + and ÷
Correct Answer: × and ÷
Solution : Given: 192 × 16 + 9 – 8 ÷ 2 = 5
Let's check the given options – First Option: × and ÷ ⇒ 192 ÷ 16 + 9 – 8 × 2 = 5 Solving the L.H.S. of the equation – = 12 + 9 – 8 × 2 = 12 + 9 – 16 = 5 Second option: + and – ⇒ 192 × 16 – 9 + 8 ÷ 2 = 5 Solving the L.H.S. of the equation – = 192 × 16 – 9 + 4 = 3072 – 9 + 4 = 3067 ≠ 5 Third option: × and – ⇒ 192 – 16 + 9 × 8 ÷ 2 = 5 Solving the L.H.S. of the equation – = 192 – 16 + 9 × 4 = 192 – 16 + 36 = 212 ≠ 5 Fourth option: + and ÷ ⇒ 192 × 16 ÷ 9 – 8 + 2 = 5 Solving the L.H.S. of the equation – = 192 × 1.78 – 8 + 2 = 341.76 – 8 + 2 = 335.76 ≠ 5
So, only the first option satisfies the given equation. Hence, the first option is correct.
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