Question : Directions: If + means −, − means ×, × means ÷ and ÷ means +, what will come in place of (?) in the following equation?
79 ÷ 64 × 8 − 7 + 12 = ?
Option 1: 123
Option 2: 117
Option 3: 138
Option 4: 147
Correct Answer: 123
Solution :
Given:
+ means −, − means ×, × means ÷ and ÷ means +
79 ÷ 64 × 8 − 7 + 12 = ?
After interchanging the given mathematical signs, we get –
⇒ 79 + 64 ÷ 8 × 7 – 12
⇒ 79 + 8 × 7 – 12
⇒ 79 + 56 – 12
= 123
So, 123 is the answer to the given equation. Hence, the first option is correct.
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