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20201013數學

Authored by 何欣恩 何欣恩

Mathematics

1st - 5th Grade

Used 5+ times

20201013數學
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14 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

哪一個不是39的質因數?

1

3

13

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

哪一個不是14的質因數?

2

14

7

3.

FILL IN THE BLANKS QUESTION

1 min • 1 pt

1到20的整數中,共有( )個質數。

(a)  

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

下面4個數中,哪一個數和33互質?

21

30

35

77

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

有一個正整數甲,其所有正因數有:1、2、4、8、16。請問甲和24的最小公倍數是多少?

8

48

50

62

6.

FILL IN THE BLANKS QUESTION

5 mins • 1 pt

水舞廣場有大、小兩個噴水池,大噴水池每18分鐘噴水一次,小噴水池每30分鐘噴水一次。上午9時30分,兩個噴水池同時噴水,下一次同時噴水是上午( )時。

(a)  

7.

FILL IN THE BLANKS QUESTION

5 mins • 1 pt

爸爸的辦公室長24公尺、寬18公尺,要鋪滿大小相同的正方形地毯,地毯地毯的邊長最大是( )公尺。

(a)  

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