If ‘+’ means ‘−’, ‘−’ means ‘×’, ‘×’ means ‘÷’ and ‘÷’ means ‘+’, find the value of ? in:40 × 8 ÷ ? − 3 + 10 = 16
A. 5
B. 3
C. 7
D. 9
A. 5
B. 3
C. 7
D. 9
Best answer
Answer: C. 7
Answer: (C) 7
After replacing the signs: \(40 \div 8 + ? \times 3 - 10 = 16\).
5 + 3 × ? − 10 = 16 → 3 × ? = 21 → ? = 7.
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