To determine which number is divisible by both 3 and 9, we can check the divisibility of each option:
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52:
- Sum of digits = 5 + 2 = 7 (not divisible by 3)
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48:
- Sum of digits = 4 + 8 = 12 (divisible by 3)
- 48 ÷ 9 = 5.33 (not divisible by 9)
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27:
- Sum of digits = 2 + 7 = 9 (divisible by 3)
- 27 ÷ 9 = 3 (divisible by 9)
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39:
- Sum of digits = 3 + 9 = 12 (divisible by 3)
- 39 ÷ 9 = 4.33 (not divisible by 9)
The only number that is divisible by both 3 and 9 is 27.