1994 AMC 8 第 6 题
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所有题目均经美国数学协会（MAA）官方合法授权使用。
6.
任意六个连续正整数的乘积的个位数字是
The unit’s digit (one’s digit) of the product of any six consecutive positive whole numbers is
小提示：
任意六个连续整数中至少有一个 的倍数，也至少有一个偶数
Among any six consecutive numbers there is at least one multiple of and at least one even number
大提示：
的倍数乘以偶数一定是 的倍数
A multiple of times an even number is a multiple of
解答：
任意六个连续正整数中至少包含一个 的倍数和一个偶数，所以它们的乘积是 的倍数。
的倍数个位数字总是 。
所以正确答案是 A。
Any six consecutive whole numbers include at least one multiple of and at least one even number, so their product is a multiple of
A multiple of always ends in .
Thus, the correct answer is A .
其他年份的第 6 题
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- 1986 AMC 8
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