两道GWD的DS题，望好心同学指点一二，谢谢

kingwangfei

Q4:

In a demographic study, the population and total income of a certain region were estimated from other data, and both estimates had lower and upper limits.  At the time of the estimates, was the per capita income for the region greater than $16,500?

(1)   The lower limit for the estimate of the population was 330,000 people.

(2) The lower limit for the estimate of the total income was $5,500,000,000.

此题没看明白说的什么意思？

Q26:

If positive integer x is a multiple of 6 and positive integer y is a multiple of 14, is xy a multiple of 105?

(1)   x is a multiple of 9.

(2) y is a multiple of 25.

这个怎么算也算不出来啊？

daisy1980626

Q4答案是E,人均收入=总收入/总人口

Q26答案是C

ellaellali

我的理解，X是6的倍数，那就说明X包含2和3这两个质数，Y是14的倍数，那就说明Y包含了2和7这两个质数，105质因子分解是3×5×7，那B答案包含了5这个因子，我认为B单独可以回答问题。