Question
Download Solution PDFBy interchanging the two numbers 20 and 36, which of the following equations will be correct?
I. 55 + 42 – 36 × 20 ÷ 9 = 17
II. 20 ÷ 2 × 36 + 81 – 41 = 400
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFBODMAS Table:
Given equation I: 55 + 42 – 36 × 20 ÷ 9 = 17
Now, if '20 and 36' are interchanged, then:
⇒ 55 + 42 – 20 × 36 ÷ 9 = 17
⇒ 55 + 42 – 20 × 4 = 17
⇒ 55 + 42 – 80 = 17
⇒ 97 – 80 = 17
= 17 = 17.
LHS = RHS.
Given equation II: 20 ÷ 2 × 36 + 81 – 41 = 400
Now, if '20 and 36' are interchanged, then:
⇒ 36 ÷ 2 × 20 + 81 – 41 = 400
⇒ 18 × 20 + 81 – 41 = 400
⇒ 360 + 81 – 41 = 400
⇒ 441 – 41 = 400
= 400 = 400
LHS = RHS.
Here, Both I and II are correct equation after interchanging the given symbol.
Hence, the correct answer is "Option 3".
Last updated on Jul 14, 2025
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