Question : Directions: If A denotes +, B denotes ×, C denotes –, and D denotes ÷, then what will come in place of (?) in the following equation?
7 A 3 B 24 D 2 = 20 B ? A 3
Option 1: 2
Option 2: 20
Option 3: 14
Option 4: 7
Correct Answer: 2
Solution :
Given:
7 A 3 B 24 D 2 = 20 B ? A 3
Let the missing number be a.
After replacing the letters with the mathematical signs, we get –
⇒ 7 + 3 × 24 ÷ 2 = 20 × a + 3
⇒ 7 + 3 × 12 = 20 × a + 3
⇒ 7 + 36 = 20 × a + 3
⇒ 43 = 20 × a + 3
⇒ 43 – 3 = 20 × a
⇒ 40 = 20 × a
⇒ a = 2
So, 2 is the answer to the given equation. Hence, the first option is correct.
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