Question : Directions: Which two numbers from amongst the given options should be interchanged to make the given equation correct? (240 ÷ 2 + 5) × 8 + 15 × 8 = 100
Option 1: 2 and 8
Option 2: 100 and 240
Option 3: 5 and 8
Option 4: 15 and 5
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Correct Answer: 2 and 8
Solution : Given: (240 ÷ 2 + 5) × 8 + 15 × 8 = 100
Interchange the numbers according to the given options. First option: 2 and 8 (240 ÷ 8 + 5) × 2 + 15 × 2 = 100 Solving the L.H.S. of the equation – = (30 + 5) × 2 + 15 × 2 = 35 × 2 + 15 × 2 = 70 + 30 = 100 = 100 (L.H.S. = R.H.S.) Second option: 100 and 240 (100 ÷ 2 + 5) × 8 + 15 × 8 = 240 Solving the L.H.S. of the equation – = (50 + 5) × 8 + 15 × 8 = 55 × 8 + 15 × 8 = 440 + 120 = 560 ≠ 240 Third option: 5 and 8 (240 ÷ 2 + 8) × 5 + 15 × 5 = 100 Solving the L.H.S. of the equation – = (128) × 5 + 15 × 5 = 640 + 75 = 715 ≠ 100 Fourth option: 15 and 5 (240 ÷ 2 + 15) × 8 + 5 × 8 = 100 Solving the L.H.S. of the equation – = (120 + 15) × 8 + 5 × 8 = 135 × 8 + 5 × 8 = 1080 + 40 = 1120 ≠ 100
So, the required numbers to correct the equation are 2 and 8. Hence, the first option is correct.
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Question : Directions: Which two numbers from amongst the given options should be interchanged to make the given equation correct? (42 ÷ 7) × 5 = 30 × 120 ÷ (10 + 5 × 2)
Option 1: 10 and 5
Option 2: 2 and 5
Option 3: 7 and 2
Option 4: 10 and 30
Question : Directions: Which two numbers from amongst the given options should be interchanged to make the given equation correct? (36 ÷ 2) × 5 –15 × 4 = 20 – 260 ÷ (5 × 3 + 2)
Option 1: 4 and 2
Option 2: 3 and 5
Option 3: 20 and 36
Option 4: 2 and 3
Question : Directions: Which two symbols from amongst the given options should be interchanged to make the given equation correct? (35 – 2) × 3 = (56 × 8 ÷ 3 + 100) × 11
Option 1: ÷ and +
Option 2: × and ÷
Option 3: + and –
Option 4: × and –
Question : Directions: Which two symbols from amongst the given options should be interchanged to make the given equation correct? (35 ÷ 7 × 50) ÷ 11 × 1 + 3 = 8
Option 1: + and –
Option 2: ÷ and +
Option 3: × and ÷
Option 4: + and ×
Question : Directions: Which two numbers from amongst the given options should be interchanged to make the given equation correct? (63 ÷ 9 + 17) ÷ 11 = 15 – 195 ÷ 17 – 2
Option 1: 11 and 15
Option 2: 17 and 15
Option 3: 195 and 63
Option 4: 2 and 15
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