If '-' means'+', '+' means '-', '*' means '÷' and '÷' means '*' then which of the following will be the correct equation?
Correct answer: D. 30 * 5 - 4 + 10 - 30 = 30
- A. 30 + 5 +14 -10 * 15 = 122
- B. 10 + 5 - 14 + 10 * 15 = 158
- C. 30 - 5 + 14 +10 * 15 = 162
- D. 30 * 5 - 4 + 10 - 30 = 30
Explanation
Option A: 30 + 5 +14 -10 * 15 = 122= 30 - 5 - 14 + 10 ÷ 15 (substituting the new symbols)= 30 - 5 - 14 + 0 (10 ÷ 15 = 0)= Option B: 10 + 5 - 14 + 10 * 15 = 158= 10 - 5 + 14 ÷ 10 - 15 (substituting the new symbols)= 10 - 5 + 1 - 15 (14 ÷ 10 = 1)= -9Option C: 30 - 5 + 14 +10 * 15 = 162= 30 + 5 - 14 - 10 ÷ 15 (substituting the new symbols)= 30 + 5 - 14 - 0 (10 ÷ 15 = 0)= 21 Option D: 30 * 5 - 4 + 10 - 30 = 30= 30 ÷ 5 + 4 - 10 + 30 (substituting the new symbols)= 6 + 4 - 10 + 30 (30 ÷ 5 = 6)= 30
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