问题
单项选择题
If k is an integer greater than 44 and less than 51,then which of the following could be the product of 11 and k ?()
A.565
B.550
C.500
D.484
E.440
答案
参考答案:B
解析:
11与k的乘积应该在484与561之间,所以(A) ,(D)和(C)都显然不对;又因为500不能被11整除,所以(C)也肯定不对,而550正好是50与11的乘积。