Question : Directions: By interchanging the given two numbers (not digits) which of the following equations will not be correct? 4 and 6
Option 1: 2 + 6 × 5 – 4 = 16
Option 2: 4 + 5 – 6 = 7
Option 3: 6 ÷ 2 – 4 × 5 = –28
Option 4: 6 × 3 – 4 ÷ 1 = 3
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Correct Answer: 6 × 3 – 4 ÷ 1 = 3
Solution : Let's check the options – First option: 2 + 6 × 5 – 4 = 16 On interchanging the given numbers, the equation becomes – ⇒ 2 + 4 × 5 – 6 = 16 Solving the L.H.S. of the equation – = 2 + 20 – 6 = 22 – 6 = 16 Second option: 4 + 5 – 6 = 7 On interchanging the given numbers, the equation becomes – ⇒ 6 + 5 – 4 = 7 Solving the L.H.S. of the equation – = 11 – 4 = 7 Third option: 6 ÷ 2 – 4 × 5 = –28 On interchanging the given numbers, the equation becomes – ⇒ 4 ÷ 2 – 6 × 5 = –28 Solving the L.H.S. of the equation – = 2 – 6 × 5 = 2 – 30 = –28 Fourth option: 6 × 3 – 4 ÷ 1 = 3 On interchanging the given numbers, the equation becomes – ⇒ 4 × 3 – 6 ÷ 1 = 3 Solving the L.H.S. of the equation – = 4 × 3 – 6 = 12 – 6 = 6 ≠ 3
So, only the equation in the fourth option does not satisfy the R.H.S. of the given equation. Hence the fourth option is correct.
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Question : Directions: By interchanging which two numbers (not digits) the given equation will be correct? 16 + 6 ÷ 18 – 5 × 1 = 14
Question : Directions: By Interchanging the given two numbers (not digits) which of the following equations will not be correct? 7 and 4 I. 4 × 3 – 7 + 8 ÷ 2 = 23 II. 7 × 5 – 9 ÷ 3 + 4 = 24
Question : Directions: Which two signs and two numbers (Not digits) should be interchanged in the given equation to make it correct? 9 ÷ 3 + 7 × 4 – 5 = 20
Question : Directions: By Interchanging the given two numbers (Not digits) which of the following equations will be correct? 8 and 7 I. 8 + 7 × 9 ÷ 3 – 6 = 25 II. 7 × 5 – 8 + 6 ÷ 2 = 38
Question : Directions: Which two signs and two numbers interchange (not digits) that will make the equation correct? 7 – 5 × 2 + 8 ÷ 4 = 17
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