Question : Directions: By interchanging the given two signs which of the following equations will be not correct? – and ×
Option 1: 20 × 12 + 6 – 16 ÷ 8 = 20
Option 2: 16 × 91 ÷ 13 + 5 – 3 = 24
Option 3: 20 × 8 – 4 ÷ 2 + 3 = 7
Option 4: 4 × 5 – 36 ÷ 6 + 10 = 10
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Correct Answer: 4 × 5 – 36 ÷ 6 + 10 = 10
Solution : Given: – and ×
Replace the given signs in the options one by one with the original signs in the given equation. First option: – and × 20 × 12 + 6 – 16 ÷ 8 = 20 = 20 – 12 + 6 × 16 ÷ 8 = 8 + 12 = 20 Second option: – and × 16 × 91 ÷ 13 + 5 – 3 = 24 = 16 – 91 ÷ 13 + 5 × 3 = 16 – 7 + 5 × 3 = 16 – 7 + 15 = 24 Third option: – and × 20 × 8 – 4 ÷ 2 + 3 = 7 = 20 – 8 × 4 ÷ 2 + 3 = 20 – 16 + 3 = 7 Fourth option: – and × 4 × 5 – 36 ÷ 6 + 10 = 10 = 4 – 5 × 36 ÷ 6 + 10 = 4 – 30 + 10 = – 16 ≠ 10
So, only in the fourth option L.H.S. ≠ R.H.S. of the given equation. Hence, the fourth option is correct.
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Question : Directions: By interchanging the given two signs which of the following equations will be correct? + and –
Option 1: 7 – 5 × 3 + 24 ÷ 6 = 7
Option 2: 20 ÷ 4 – 5 × 6 + 3 = 32
Option 3: 4 + 5 × 2 – 9 ÷ 3 = 5
Option 4: 7 × 3 – 10 + 8 ÷ 2 = 29
Question : Directions: By interchanging the given two signs which of the following equations will be correct? ÷ and +
Option 1: 8 + 4 × 5 ÷ 2 – 6 = 7
Option 2: 16 + 8 × 2 ÷ 6 – 4 = 8
Option 3: 18 + 2 × 6 ÷ 3 – 7 = 50
Option 4: 11 + 8 × 16 ÷ 4 – 7 = 20
Question : Directions: By interchanging the given two signs which of the following equations will be correct? × and +
Option 1: 7 × 8 ÷ 9 + 18 – 11 = 16
Option 2: 24 – 8 – 5 × 5 + 3 = 14
Option 3: 5 × 10 – 15 + 20 ÷ 25 = 8
Option 4: 24 × 8 + 6 ÷ 3 – 18 = 22
Question : Directions: By interchanging the given two signs and numbers which of the following equations will be correct? + and –, 7 and 6
Option 1: 4 × 7 + 6 – 3 ÷ 1 = 20
Option 2: 8 × 7 + 5 ÷ 1 – 6 = 17
Option 3: 7 – 6 × 3 + 4 ÷ 1 = 8
Option 4: 7 × 2 – 6 + 4 ÷ 2 = 13
Question : Directions: By interchanging the given two signs which of the following equations will be correct? × and –
Option 1: 7 × 9 – 8 ÷ 2 + 6 = 25
Option 2: 8 × 6 – 9 ÷ 3 + 10 = 0
Option 3: 16 – 4 ÷ 2 + 8 × 1 = 36
Option 4: 5 + 7 × 3 – 4 ÷ 2 = 8
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