Question : Directions: If A stands for ÷, B stands for ×, C stands for + and D stands for –, what will come in place of the question mark (?) in the following equation?
3 B 27 D 5 C 7 A 7 = ?
Option 1: 57
Option 2: 87
Option 3: 77
Option 4: 67
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Correct Answer: 77
Solution :
Given:
A stands for ÷, B stands for ×, C stands for + and D stands for –
3 B 27 D 5 C 7 A 7 = ?
On replacing the alphabet with the mathematical signs according to the instructions given, we get –
= 3 × 27 – 5 + 7 ÷ 7
= 3 × 27 – 5 + 1
= 81 – 5 + 1
= 82 – 5
= 77
So, 77 is the required answer to the given equation. Hence, the third option is correct.
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