Question
Download Solution PDFBy interchanging the given two signs and numbers which of the following equation will be correct?
+ and ×, 1 and 2
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFAccording to the question, after interchanging the given two signs and numbers :
- + and ×
- 1 and 2
So,
- Option - (1) : 8 × 3 – 4 ÷ 2 + 1 = 7
After interchanging:
8 + 3 – 4 ÷ 1 × 2 = 7
8 + 3 – 4 × 2 = 7
8 + 3 - 8 = 7
11 - 8 = 7
3 ≠ 7 (LHS ≠ RHS)
- Option - (2) : 2 × 3 – 8 ÷ 1 + 9 = 18
After interchanging:
1 + 3 – 8 ÷ 2 × 9 = 18
1 + 3 - 4 × 9 = 18
1 + 3 - 36 = 18
4 - 36 = 18
-32 ≠ 18 (LHS ≠ RHS)
- Option - (3) : 8 × 3 – 4 ÷ 2 + 1 = 3
After interchanging:
8 + 3 – 4 ÷ 1 × 2 = 3
8 + 3 – 4 × 2 = 3
8 + 3 - 8 = 3
11 - 8 = 3
3 = 3 (LHS = RHS)
- Option - (4) : 2 × 3 – 8 ÷ 1 + 2 = 5
After interchanging:
1 + 3 – 8 ÷ 2 × 1 = 5
1 + 3 - 4 × 1 = 5
1 + 3 - 4 = 5
4 - 4 = 5
0 ≠ 5 (LHS ≠ RHS)
Here, digit - (2) is repeated, therefore this option is invalid.
Last updated on Jul 7, 2025
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