A number is trebled and then 5 is subtracted to give 22. Find the number.
- A.7
- B.8
- C.9 ✓
- D.10
Explanation: Reverse: 22+5=27, then 27÷3=9.
Class 6 IMO Mathematics Olympiad practice · Olympiad Thinking · Working Backwards & Problem-Solving Strategies
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