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
Option 1: Only I
Option 2: Neither I nor II
Option 3: Only II
Option 4: Both I and II
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Correct Answer: Only II
Solution : Given: 8 and 2 are interchanged – I. 8 × 4 – 6 ÷ 3 + 2 = 14 II. 6 – 8 × 3 + 2 ÷ 1 = 9
For equation I – After interchanging the given numbers, we get – ⇒ 2 × 4 – 6 ÷ 3 + 8 ⇒ 2 × 4 – 2 + 8 ⇒ 8 – 2 + 8 ⇒ 14 For equation II – After interchanging the given numbers, we get – ⇒ 6 – 2 × 3 + 8 ÷ 1 ⇒ 6 – 2 × 3 + 8 ⇒ 6 – 6 + 8 ⇒ 8 ≠ 9
So, only equation II doesn't give the required answer. Hence, the third option is correct.
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Question : Directions: By Interchanging the given two numbers which of the following equations will be not correct? 9 and 3 I. 7 × 4 ÷ 2 – 9 + 3 = 22 II. 9 + 4 – 6 × 3 ÷ 2 = –10
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