Question : Directions: If A denotes +, B denotes ×, C denotes –, and D denotes ÷, then what will come in place of (?) in the following equation?
(9 A 9 C 55 D 5) B ? = 10 B 3 A 5
Option 1: 5
Option 2: 7
Option 3: 11
Option 4: 4
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Correct Answer: 5
Solution :
Given:
A denotes +, B denotes ×, C denotes –, and D denotes ÷.
(9 A 9 C 55 D 5) B ? = 10 B 3 A 5
On replacing the alphabet with the mathematical signs, we get –
L.H.S. = (9 A 9 C 55 D 5) B (?)
= (9 + 9 – 55 ÷ 5) × (?)
= (9 + 9 – 11) × (?)
= (18 – 11) × (?)
= 7 × (?)
R.H.S. = 10 × 3 + 5
= 30 + 5
= 35
Since, L.H.S. = R.H.S.
⇒ 7 × (?) = 35
⇒ (?) = 35 ÷ 7
⇒ (?) = 5
So, 5 is the required answer. Hence, the first option is correct.
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