A number is chosen from 1 to 100. It is divisible by 3 but not by 6. How many such numbers are there?
- A.16
- B.17 ✓
- C.18
- D.19
Explanation: Multiples of 3 from 1-100: 33. Multiples of 6 from 1-100: 16. Divisible by 3 but not 6: 33−16=17.
Class 6 IMO Mathematics Olympiad practice · HOTS / Achievers · Multi-Concept Achievers
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