How many integers from 0 to 50, inclusive, have a remainder of 1 when divided by 3 ?
A.15
B.16
C.17
D.18
E.19
我选B,答案是C??
别忘了1也是!
1+16×3=49 ,共有1个加16个=17个
1,4,7。。。49 共17个。
1=0+1=0×3+1
别忘了0是任何数的倍数!!!刚才还有个mm问这个关于0的问题呢。
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