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If n=8mathquill-command-id="6" mathquill-block-id="7">11 ?-8，what’s the units digit of n?
A.0
B.1
C.4
D.6
E.8
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答案：
C
求n的個位?
?是多少
這題要知道速算法，因為8的次方數(shù)，他的個位數(shù)應該是依次為8 4 2 6，11次方，應該就是個位數(shù)為2，那在減去8，應該就是4
這是最簡單的，當然也可以直接硬算出來
8的11次方＝8*8*8*8*8*8*8*8*8*8*8＝8589934592 
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