Question
Download Solution PDFBy interchanging the given two signs which of the following equation will be not correct?
+ and –
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFAccording to the question, after interchanging the given two signs ' and –' :
So,
- Option - (1) : 18 ÷ 3 + 8 × 5 – 4 = 30
18 ÷ 3 - 8 × 5 + 4 = 30
6 - 8 × 5 + 4 = 30
6 + 4 - 40 = 30
10 - 40 = 30
-30 ≠ 30 (LHS ≠ RHS)
- Option - (2) : 4 × 6 + 7 – 3 ÷ 1 = 20
4 × 6 - 7 + 3 ÷ 1 = 20
4 × 6 - 7 + 3 = 20
24 + 3 - 7 = 20
27 - 7 = 20
20 = 20 (LHS = RHS)
- Option - (3) : 18 + 8 × 6 ÷ 3 – 11 = 13
18 - 8 × 6 ÷ 3 + 11 = 13
18 - 8 × 2 + 11 = 13
18 + 11 - 16 = 13
29 - 16 = 13
13 = 13 (LHS = RHS)
- Option - (4) : 6 × 9 + 7 – 8 ÷ 2 = 51
6 × 9 - 7 + 8 ÷ 2 = 51
6 × 9 - 7 + 4 = 51
54 + 4 - 7 = 51
58 - 7 = 51
51 = 51 (LHS = RHS)
Last updated on Jul 8, 2025
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