1上 2-2 最大公因數與最小公倍數
Quiz
•
Mathematics
•
7th Grade
•
Practice Problem
•
Hard
康軒數位 康軒數位
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
有a、b兩數,已知(a , b)=6,a×b=1260,求[a , b]=?
60
210
420
7560
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
設a、b為正整數,a>b,若 a+b=168,且[a , b]=45×(a , b),則a-b=?
52
48
39
36
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
假如a=22×33×7、b=2×32×13、則下列敘述何者正確?
甲、a與b最小公倍數的質因數是2、3、7、13
乙、a與b的質因數個數相等
丙、a與b的最大公因數是24
只有甲乙
只有乙丙
只有甲丙
甲乙丙
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
觀察下面的短除法,判斷下列敘述何者正確?
c是a、b的公因數
g是a、b的公因數
h是a、b的公因數
a×b=c×f×g×h
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
5
14
28
42
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
糖果156顆或180顆均可平均分配給一群小朋友,則下列敘述何者錯誤?
甲:小朋友人數是156與180的公因數
乙:先將180顆中的156顆拿出平分給該群小朋友後,再將24顆平分給小朋友,因此小朋友人數一定是24的因數
丙:(156 , 180)=(156 , 24)
丁:小朋友人數是24人
甲
乙
丙
丁
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
已知P=24×33×53×11,P的因數有160個,今將P的因數由小到大依序排列為a1<a2<a3<……<a160,則下列敘述何者正確?
甲:23×33×54為P的因數
乙:a1=2
丙:a3=3
丁:a160=24×33×53×11
甲、乙
甲、丙
丙、丁
乙、丙
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