Question : Directions: Which two numbers (not digits) should be interchanged to make the given equation correct? 5 – 6 ÷ 3 × 9 + 1 = 0
Option 1: 1 and 0
Option 2: 6 and 9
Option 3: 5 and 9
Option 4: 6 and 3
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Correct Answer: 5 and 9
Solution : Given: 5 – 6 ÷ 3 × 9 + 1 = 0
Let's check the options – First option: 1 and 0 5 – 6 ÷ 3 × 9 + 1 = 0 On interchanging the numbers, we get – ⇒ 5 – 6 ÷ 3 × 9 + 0 = 1 ⇒ 5 – 2 × 9 + 0 = 1 ⇒ 5 – 18 + 0 = 1 ⇒ –13 ≠ 1 Second option: 6 and 9 5 – 6 ÷ 3 × 9 + 1 = 0 On interchanging the numbers, we get – ⇒ 5 – 9 ÷ 3 × 6 + 1 = 0 ⇒ 5 – 3 × 6 + 1 = 0 ⇒ 5 – 18 + 1 = 0 ⇒ –12 ≠ 0 Third option: 5 and 9 5 – 6 ÷ 3 × 9 + 1 = 0 On interchanging the numbers, we get – ⇒ 9 – 6 ÷ 3 × 5 + 1 = 0 ⇒ 9 – 2 × 5 + 1 = 0 ⇒ 9 – 10 + 1 = 0 ⇒ 0 Fourth option: 6 and 3 5 – 6 ÷ 3 × 9 + 1 = 0 On interchanging the numbers, we get – ⇒ 5 – 3 ÷ 6 × 9 + 1 = 0 ⇒ 5 – 0.5 × 9 + 1 = 0 ⇒ 5 – 4.5 + 1 = 0 ⇒ 1.5 ≠ 0
Here, only the third option satisfies the equation. Hence, the third option is correct.
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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
Option 1: ÷ and –, 5 and 4
Option 2: × and –, 3 and 5
Option 3: + and ×, 9 and 7
Option 4: ÷ and –, 7 and 5
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
Question : Directions: Which two signs and two numbers interchange (not digits) that will make the equation correct? 7 – 5 × 2 + 8 ÷ 4 = 17
Option 1: – and ÷, 8 and 5
Option 2: × and ÷, 5 and 4
Option 3: + and –, 4 and 5
Option 4: + and –, 7 and 5
Question : Directions: After interchanging the given two numbers (Not digits) what will be the values of expression (I) and (II) respectively? 6 and 9 I. 9 ÷ 3 × 4 – 6 + 5 II. 9 + 3 ÷ 2 × 4 – 6
Option 1: 4 and 3
Option 2: 10 and 9
Option 3: 9 and 10
Option 4: 3 and 4
Question : Directions: Which two signs and two numbers (Not digits) of the equation should be interchanged to make it correct? 13 × 12 ÷ 36 + 11 – 7 = 35
Option 1: + and ×, 36 and 7
Option 2: + and –, 12 and 7
Option 3: × and ÷, 13 and 36
Option 4: × and ÷,11 and 7
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