Question
Download Solution PDFWhich two signs should be interchanged to make the given equation correct?
10 - 4 + 13 ÷ 15 × 3 = 71
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF
Given statement : 10 - 4 + 13 ÷ 15 × 3 = 71
According to the question, after interchanging the signs :
So,
- Option - (1) : + and ×
10 - 4 + 13 ÷ 15 × 3 = 71 ⇒ 10 - 4 × 13 ÷ 15 + 3 = 71
10 - 4 × 0.87 + 3 = 71
10 + 3 - 3.48 = 71
13 - 3.48 = 71
9.52 ≠ 71 (LHS ≠ RHS)
- Option - (2) : - and ÷
10 - 4 + 13 ÷ 15 × 3 = 71 ⇒ 10 ÷ 4 + 13 - 15 × 3 = 71
2.5 + 13 - 15 × 3 = 71
2.5 + 13 - 45 = 71
15.5 - 45 = 71
29.5 ≠ 71 (LHS ≠ RHS)
- Option - (3) : ÷ and ×
10 - 4 + 13 ÷ 15 × 3 = 71 ⇒ 10 - 4 + 13 × 15 ÷ 3 = 71
10 - 4 + 13 × 5 = 71
10 + 65 - 4 = 71
75 - 4 = 71
71 = 71 (LHS = RHS)
- Option - (4) : - and ×
10 - 4 + 13 ÷ 15 × 3 = 71 ⇒ 10 × 4 + 13 ÷ 15 - 3 = 71
10 × 4 + 0.87 - 3 = 71
40 + 0.87 - 3 = 71
40.87 - 3 = 71
37.87 ≠ 71 (LHS ≠ RHS)
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