小弟是第一次做GMAT的数学,下面两题想请教下各位:
1,If n is the product of the integers from1 to 20 inclusive, what is the greatest integer k for which 2k is a factor of n?
A. 10
B. 12
C. 15
D. 18
E. 20
2,If n = 811 – 8, what is the units digit of n?
A. 0
B. 1
C. 4
D. 6
E. 8
能翻译下题目的后半句吗?谢谢
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