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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Correct Answer: 8 × 6 – 9 ÷ 3 + 10 = 0
Solution : Given: × and –
Replace the given symbols in the options one by one with the original symbols in the given equation. First option: 7 × 9 – 8 ÷ 2 + 6 = 25 = 7 – 9 × 8 ÷ 2 + 6 = 7 – 36 + 6 = –23 ≠ 25 Second option: 8 × 6 – 9 ÷ 3 + 10 = 0 = 8 – 6 × 9 ÷ 3 + 10 = 8 – 18 + 10 = 0 Third option: 16 – 4 ÷ 2 + 8 × 1 = 36 = 16 × 4 ÷ 2 + 8 – 1 = 32 + 8 – 1 = 39 ≠ 36 Fourth option: 5 + 7 × 3 – 4 ÷ 2 = 8 = 5 + 7 – 3 × 4 ÷ 2 = 8 = 12 – 6 = 6 ≠ 8
Here, only the second option satisfies the R.H.S. of the given equation. Hence, the second 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: 9 × 18 + 27 ÷ 36 – 30 = 18
Option 2: 9 + 3 × 2 – 8 ÷ 1 = –1
Option 3: 16 + 8 × 2 ÷ 6 – 9 = 10
Option 4: 16 + 2 × 6 ÷ 3 – 7 = 50
Question : Directions: By interchanging the given two signs and numbers which of the following equations will be correct? – and +, 6 and 3
Option 1: 7 – 3 × 2 ÷ 6 + 4 = 17
Option 2: 8 × 3 – 6 + 4 ÷ 2 = 49
Option 3: 7 + 6 ÷ 3 × 8 – 5 = 35
Option 4: 9 – 6 ÷ 4 + 3 × 7 = 8
Question : Directions: By interchanging the given two signs and numbers which of the following equations will be correct? × and +, 9 and 6
Option 1: 7 × 6 ÷ 3 + 9 – 8 = 17
Option 2: 6 × 8 – 9 ÷ 3 + 5 = 50
Option 3: 7 + 6 × 4 ÷ 9 – 8 = 8
Option 4: 9 × 7 + 4 ÷ 1 – 6 = 7
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 and numbers which of the following equations will be correct? × and ÷, 7 and 9
Option 1: 9 – 7 × 2 + 6 ÷ 3 = 11
Option 2: 9 + 4 × 3 – 7 ÷ 1 = 40
Option 3: 8 × 3 ÷ 6 + 9 – 7 = 14
Option 4: 9 × 3 + 4 ÷ 2 – 7 = 18
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