- A19
- B21
- C18
- D20
Step-by-Step Solution
From 5 July to 31 August is 26 + 31 = 57 days. Tablets fall on day 0, 3, 6, …, 57: 57 ÷ 3 = 19 gaps, so 19 + 1 = 20 tablets (the last one on 31 August). (19 forgets the first tablet.)
Answer: D) 20
Starting on the circled date, Grandma takes a vitamin tablet every third day. How many tablets does she take in the two months shown?
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