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 PDFBy using the BODMAS rule:
Checking the options:
1. 15 + 5 ÷ 1 - 9 × 4 = 70
After interchanging the symbols × and -
⇒15 + 5 ÷ 1 × 9 - 4 = 70
⇒15 + 5 × 9 - 4 = 70
⇒15 + 45 - 4 = 70
⇒60 - 4 = 70
⇒56 ≠ 70
2. 5 - 6 × 3 + 16 ÷ 4 = 31
After interchanging the symbols × and -
⇒5 × 6 - 3 + 16 ÷ 4 = 31
⇒5 × 6 - 3 + 4 = 31
⇒30 - 3 + 4 = 31
⇒27 + 4 = 31
⇒31 = 31
3. 11 + 6 × 3 - 8 ÷ 2 = 5
After interchanging the symbols × and -
⇒11 + 6 - 3 × 8 ÷ 2 = 5
⇒11 + 6 - 3 × 4 = 5
⇒11 + 6 - 12 = 5
⇒17 - 12 = 5
⇒5 = 5
4. 15 - 4 × 3 + 6 ÷ 1 = 63
After interchanging the symbols × and -
⇒15 × 4 - 3 + 6 ÷ 1 = 63
⇒15 × 4 - 3 + 6 = 63
⇒60 - 3 + 6 = 63
⇒57 + 6 = 63
⇒63 = 63
Only option 1 is not followed.
Hence, the correct answer is option 1.
Last updated on Jun 13, 2025
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