Question : Directions: By Interchanging the given two numbers which of the following equations will be correct? 5 and 4 I. 4 + 8 × 5 – 7 ÷ 1 = 30 II. 5 × 3 – 4 + 6 ÷ 2 = 11
Option 1: Both I and II
Option 2: Neither I nor II
Option 3: Only II
Option 4: Only I
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Correct Answer: Only I
Solution : Given: I. 4 + 8 × 5 – 7 ÷ 1 = 30 II. 5 × 3 – 4 + 6 ÷ 2 = 11 Interchanging the numbers 5 and 4.
Equation I: 4 + 8 × 5 – 7 ÷ 1 = 30 ⇒ 5 + 8 × 4 – 7 ÷ 1 = 30 = 5 + 8 × 4 – 7 = 5 + 32 – 7 = 37 – 7 = 30 = R.H.S. Equation II: 5 × 3 – 4 + 6 ÷ 2 = 11 ⇒ 4 × 3 – 5 + 6 ÷ 2 = 11 = 4 × 3 – 5 + 3 = 12 – 5 + 3 = 10 ≠ 11
So, only equation I satisfies the R.H.S. Hence, the fourth option is correct.
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Question : Directions: By Interchanging the given two numbers which of the following equations will be correct? 7 and 4 I. 7 × 8 + 4 – 9 ÷ 3 = 30 II. 9 + 4 × 8 ÷ 2 – 7 = 33
Option 1: Neither I nor II
Option 2: Only II
Option 3: Both I and II
Question : Directions: By Interchanging the given two numbers which of the following equations will be correct? 7 and 8 I. 5 × 7 + 6 ÷ 2 – 8 = 36 II. 8 + 3 × 7– 5 ÷ 1 = 26
Question : Directions: By interchanging the given two signs which of the following equations will NOT be correct? × and – I. 4 ÷ 2 + 1 × 6 – 3 = 13 II. 5 + 7 – 8 × 2 ÷ 1 = 58
Option 1: Only II
Option 2: Only I
Option 3: Neither I nor II
Option 4: Both I and II
Question : Directions: By interchanging the given two signs which of the following equations will be not correct? + and – I. 4 × 6 + 7 – 3 ÷ 1 = 21 II. 6 × 9 + 7 – 8 ÷ 2 = 51
Option 1: Only I
Option 2: Both I and II
Option 4: Only II
Question : Directions: By Interchanging the given two numbers which of the following equations will be not correct? 8 and 2 I. 8 × 4 – 6 ÷ 3 + 2 = 14 II. 6 – 8 × 3 + 2 ÷ 1 = 9
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