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五年級數學比賽(第三部分)--重賽

Authored by 蔡建文 蔡建文

Mathematics

5th Grade

Used 15+ times

五年級數學比賽(第三部分)--重賽
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

一個自然數比10小,它是2的倍數,又有因數3,這個自然數是(     )

A. 8

B. 3

C. 6

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

鐘表指針从“3”轉到“6”,掃过了鐘面的(       )

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

如果a÷b=5(a、b是非0自然數),那么a和b的最小公倍數是(       )。

A. a

B. b

C. 5

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

下列數中,是互質數的一組是(       )。

A. 9和15

B. 8和9

C. 14和21

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A. 都是奇數

B. 最大公因數是1

C. 最小公倍數是1

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

下面敘述錯誤的是(       )

A.一个非零自然數不是質數就是合數

B.互質的两个数不一定都是質數

C.所有自然數,不是奇數就是偶數

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