How many integers from 1 to 32 are divisible by 5 or by 5 (or both)?
Answer and explanation
Correct answer: D.
- Step 1: Divisible by 5: ; by 5: ; by both (multiples of 5): . Step 2. Count . **Answer: . Why not the others:** counts the common multiples twice; is off by one; multiplies the counts.
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