Question

What will come in the place of the question mark (?) in the following equation if ‘4’ and ‘5’ are interchanged? 20 ÷ 4 + 5 × 10 = ?

• A. 44
• B. 100
• C. 55
• D. 80

Answer 1

Answer:

A. 44

The number that will replace the question mark (?) is 44.

1. Interchange the numbers:
   Swap 4 and 5 in the original equation:
   $\text{Original: } 20 \div 4 + 5 \times 10 = ?$
   $\text{New Equation: } 20 \div 5 + 4 \times 10 = ?$

2. Apply BODMAS / PEMDAS rules:

   • Division first: $20 \div 5 = 4$

   • Multiplication next: $4 \times 10 = 40$

   • Addition last: $4 + 40 = 44$