Question

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? 120 A 90 B 10 C 100 D 20 = ?

• A. 75
• B. 88
• C. 80
• D. 85

Answer 1

Answer:

C. 80

The value that will come in place of the question mark is 80.

1. Replace the Letters with Mathematical Symbols

Based on the given conditions:

• A $\rightarrow -$

• B $\rightarrow +$

• C $\rightarrow \times$

• D $\rightarrow \div$

Substituting these into the equation gives:
$120 - 90 + 10 \times 100 \div 20 = ?$

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2. Apply the BODMAS Rule

We must solve the operations in order: Division, Multiplication, Addition, and then Subtraction.

• Step 1: Division ($100 \div 20$)
  $100 \div 20 = 5$
  The equation becomes:
  $120 - 90 + 10 \times 5 = ?$

• Step 2: Multiplication ($10 \times 5$)
  $10 \times 5 = 50$
  The equation becomes:
  $120 - 90 + 50 = ?$

• Step 3: Addition and Subtraction (Left to Right)
  $120 - 90 = 30$
  $30 + 50 = \mathbf{80}$