[求助]谢谢大家帮我看看这道数学题。

If the range of the six numbers 4,3,14,7,10,and x is 12,what is the difference between the greatest possible value of x and least possible value of x?

a.0

b.2

c.12

d.13

e.15

答案是d，题没看懂，谢谢大家看看为什么选d？

Does the decimal equivalent of p/q,where p and q are positive integers,contain only a finite number of nonzero digits?

1.p>q

2.q=8

请问请改选什么？谢谢

Does the decimal equivalent of p/q,where p and q are positive integers,contain only a finite number of nonzero digits?

1.p>q

2.q=8

请问请改选什么？谢谢

选B吧,因为7>3,而7/3=2.333333333,不充分;而q=8,则1/8=0.125,P*1/8必为不循环的数.

明白了，谢谢haiqi2006