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倍數和因數

Authored by Phoebe Mok

Mathematics

4th Grade

Used 16+ times

倍數和因數
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9 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

12 的首3個倍數是?

36

12

24, 36, 48

12, 24, 36

Answer explanation

留意題目:

「首三個」

「第三個」

2.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Media Image

12的第3個倍數是?

12

3

15

36

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

在 34 以內, 11 的倍數有多少個?

4

34

11

3

Answer explanation

11x1 = 11

11x2 = 22

11x3 = 33

11x4 = 44 ( > 34)

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

75 是 5 的第幾個倍數?

14

15

75

5

Answer explanation

5 x 15 = 75

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

以下哪一個是63的所有因數?

0, 1, 3, 7, 9, 21, 63

1, 3, 6, 9, 21

1, 3, 7, 9, 21, 63

1, 3, 6, 9, 21, 63

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

以下哪個數所擁有的因數數目最小?

(提示: 質數只有2 個因數)

4

49

75

83

7.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Media Image

以下哪些數只有3個因數?

9

4

73

121

Answer explanation

9: 1x9, 3x3 (1, 3, 9)

4: 1x4, 2x2 (1, 2, 4)

121: 1x121, 11x11 (1, 11, 121)

73 是質數

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