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
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Correct Answer: 20 ÷ 4 – 5 × 6 + 3 = 32
Solution : Given: + and –
Replace the given symbols in the options one by one with the original symbols in the given equation. First option: 7 – 5 × 3 + 24 ÷ 6 = 7 ⇒ 7 + 5 × 3 – 24 ÷ 6 = 7 = 7 + 15 – 4 = 18 ≠ 7 Second option: 20 ÷ 4 – 5 × 6 + 3 = 32 ⇒ 20 ÷ 4 + 5 × 6 – 3 = 32 = 5 + 30 – 3 = 32 Third option: 4 + 5 × 2 – 9 ÷ 3 = 5 ⇒ 4 – 5 × 2 + 9 ÷ 3 = 5 = 4 – 10 + 3 = –3 ≠ 5 Fourth option: 7 × 3 – 10 + 8 ÷ 2 = 29 ⇒ 7 × 3 + 10 – 8 ÷ 2 = 29 = 21 + 10 – 4 = 27 ≠ 29
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 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 and numbers which of the following equations will be correct? × and +, 6 and 4
Option 1: 3 × 9 – 4 ÷ 2 + 6 = 8
Option 2: 8 × 6 + 4 ÷ 2 – 5 = –5
Option 3: 8 – 3 × 6 + 4 ÷ 1 = 18
Option 4: 7 × 6 – 4 + 9 ÷ 3 = –7
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
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 which of the following equations will be not correct? + and ÷
Option 1: 18 + 6 – 6 ÷ 3 × 3 = 6
Option 2: 18 + 2 × 6 ÷ 3 – 7 = 50
Option 3: 7 × 8 ÷ 4 + 2 – 6 = 49
Option 4: 6 × 9 + 3 – 24 ÷ 8 = 2
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