倍數和因數 Multiples and Factors

35 最小的因數是什麼？

What is the smallest factor of 35?

• 1

• 5

• 7

• 35

35 最大的因數是什麼？

What is the greatest factor of 35?

• 1

• 35

• 70

哪一個數同時是 30 的因數和倍數？

Which number is both a factor and multiple of 30?

• 1

• 10

• 30

• 60

90 是 3 和 5 的 __________。

90 is a __________ of 3 and 5.

• 倍數 multiple

• 因數 factor

13 的第 5 個倍數是什麼？

What is the fifth multiple of 13?

以下哪些是 81 的因數？（選出所有正確答案）

Which of the following is/are the factors of 81? (Choose all the correct answers)

• 1

• 2

• 3

• 7

• 9

某數的第五個倍數是 75，這個數的第七個倍數是 ________。

The fifth multiple of a number is 75. The seventh multiple of this number is ________.

• 5

• 15

• 90

• 105

以下哪一個是質數？

Which of the following numbers is a prime number?

• 1

• 31

• 33

• 42

以下哪一個數是合成數？

Which of the following numbers is a composite number?

• 2

• 13

• 19

• 21

列出 6 的首五個倍數。

List the first 5 multiples of 6.

• 1, 2, 3, 6, 12

• 6, 18, 30, 42, 54

• 6, 12, 18, 24, 30