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( )

五年級數學比賽(第三部分)--重賽

Quiz
•
Mathematics
•
5th Grade
•
Hard
蔡建文 蔡建文
Used 15+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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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