SAT reasoning test A positive integer is said to b

发布时间：2021-02-27 22:48:32

SAT reasoning test A positive integer is said to be tri-factorable if it is the product of three consecutive integers.How many positive integers less than 1,000 are tri-factorable?

网友回答

就是问 1000以内,有多少个数是三个连续整数的乘积.
这样考虑,1000=10*10*10,因此这三个连续整数必然不能都大于10.
1,2,32,3,43,4,5...可以想到,最大的那组数是9,10,11.
因此1000以内,共有9个thr-factorable
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