Question
Download Solution PDFWhich two signs should be interchanged to make the below equation mathematically correct?
104 ÷ 13 + 78 - 3 × 2 = 143
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF1. ÷ and -
104 - 13 + 78 ÷ 3 × 2 = 143
⇒ 104 - 13 + 26 × 2 = 143
⇒ 104 - 13 + 52 = 143
⇒ 156 - 13 = 143
⇒ 143 = 143
2. × and -
104 ÷ 13 + 78 × 3 - 2 = 143
⇒ 8 + 234 - 2 = 143
⇒ 242 - 2 = 143
⇒ 240 ≠ 143
3. ÷ and ×
104 × 13 + 78 - 3 ÷ 2 = 143
⇒ 1352 + 78 - 1.5 = 143
⇒ 1430 - 1.5 = 143
⇒ 1428.5 ≠ 143
4. + and ×
104 ÷ 13 × 78 - 3 + 2 = 143
⇒ 8 × 78 - 3 + 2 = 143
⇒ 624 - 3 + 2 = 143
⇒ 626 - 3 = 143
⇒ 623 ≠ 143
Hence, '÷ and -' is the correct answer.
Last updated on Jul 8, 2025
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