2. 外语
  3. Which of the following integers are multiples of both 2 and 3 ? Indicate all such integers. A 8 B 9 C 12 D 18 E 21 F 36

Which of the following integers are multiples of both 2 and 3 ? Indicate all such integers. A 8 B 9 C 12 D 18 E 21 F 36

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问题 Which of the following integers are multiples of both 2 and 3 ? Indicate all such integers.
A 8
B 9
C 12
D 18
E 21
F 36
选项
答案C，D，F
解析 You can first identify the multiples of 2, which are 8, 12,18, and 36, and then among the multiples of 2 identify the multiples of 3, which are 12, 18, and 36. Alternatively, if you realize that every number that is a multiple of 2 and 3 is also a multiple of 6, you can identify the choices that are multiples of 6.
The correct answer consists of Choices C(12), D(18), and F(36).
This explanation uses the following strategies.
Strategy 1: Translate from Words to an Arithmetic or Algebraic Representation
Strategy 11: Divide into Cases
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