Question
Download Solution PDFWhich of the following sets of signs should be used to replace * in the following?
72 * 4 * 2 = 3 * 5 * 1
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven: 72 * 4 * 2 = 3 * 5 * 1
According to the question, after replacing the signs :
Option 1) x - ÷ +
72 * 4 * 2 = 3 * 5 * 1 ⇒ 72 × 4 - 2 = 3 ÷ 5 + 1
⇒ 72 × 4 - 2 = 3 ÷ 5 + 1
⇒ 288 - 2 = 0.6 + 1
286 ≠ 1.06 (LHS ≠ RHS)
Option 2) + × × +
72 * 4 * 2 = 3 * 5 * 1 ⇒ 72 + 4 × 2 = 3 × 5 + 1
⇒ 72 + 4 × 2 = 3 × 5 + 1
⇒ 72 + 8 = 15 + 1
80 ≠ 16 (LHS ≠ RHS)
Option 3) ÷ - × +
72 * 4 * 2 = 3 * 5 * 1 ⇒ 72 ÷ 4 - 2 = 3 × 5 + 1
⇒ 72 ÷ 4 - 2 = 3 × 5 + 1
⇒ 18 - 2 = 15 + 1
16 = 16 (LHS = RHS)
Option 4) + × ÷ -
72 * 4 * 2 = 3 * 5 * 1 ⇒ 72 + 4 × 2 = 3 ÷ 5 - 1
⇒ 72 + 4 × 2 = 3 ÷ 5 - 1
⇒ 72 + 8 = 0.6 - 1
80 ≠ -0.4 (LHS ≠ RHS)
Hence, "Option 3" is the correct answer.
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