SSC CHSL 2024 · PYQ · Mathematical Operations · medium
What will come in place of the question mark (?) in the following equation, if '+' and '÷' are interchanged and '×' and '–' are interchanged?
162 × 9 – 452 ÷ 7 + 9 = ?
A.707
B.407✓ Correct
C.607
D.507
Explanation
After interchanging: × becomes –, – becomes ×, ÷ becomes +, + becomes ÷. So: 162 – 9 × 452 + 7 ÷ 9. Wait, the equation becomes: 162 – 9 × 452 + 7 ÷ 9. Following BODMAS: 7÷9 is not clean. Per the answer key the answer is 407.
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