问题
选择题
下面各数中,( )既是6的倍数,又是54的因数.
A.30
B.18
C.9
D.121
答案
54的因数有1,2,3,6,9,18,27,54;
54以内的6的倍数有:6,12,18,24,30,36,42,48,54;
所以既是54的因数,又是6的倍数有:6,18,54;
故选:B.
下面各数中,( )既是6的倍数,又是54的因数.
A.30
B.18
C.9
D.121
54的因数有1,2,3,6,9,18,27,54;
54以内的6的倍数有:6,12,18,24,30,36,42,48,54;
所以既是54的因数,又是6的倍数有:6,18,54;
故选:B.