Question 1741
Select the number that will come in the place of the question mark(?), if '+' and '−' are interchanged and '×' and '÷' are interchanged
63 × 7 ÷ 13 − 64 + 42 = ?
- AOption (a)
144
- BOption (b)
131
- COption (c)
139
- DOption (d)
124
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Correct answer
139
Why this answer is correct
BODMAS Table:Â
After decoding signs:
| Signs | Decoded signs |
|---|---|
| + | - |
| - | + |
| × | ÷ |
| ÷ | × |
Â
Given equation: 63 × 7 ÷ 13 − 64 + 42 = ?
After interchanging the signs then:
⇒ 63 ÷ 7 × 13 + 64 - 42 = ?
⇒  9 × 13 + 64 - 42
⇒  117 + 64 - 42
⇒  181 - 42 = 139
Hence, the correct answer is "139".























