提问几道GRE数学题P48A number between 5 and 10与A number be

提问几道GRE数学题P48A number between 5 and 10与A number be

A number between 5 and 10是一个5-10之间的数,A number between 8 and 14是一个8-14之间的数,所以大小关系不确定,可能前者大,也可能后者大,或相等The number of different positive divisors of 12是12的正因数个数,有1,2,3,4,6,12共6个the number of different positive divisors of 50是50的正因数个数,有1,2,5,10,25,50共6个所以相等x,y,z are positive integers,and z>x>y.The remainder when z is divided by x指z除以x的余数The remainder when z is divided by y指z除以y的余数这是不确定的,举例来说吧,如 10>9>8,这时10除以9的余数比10除以8的余数小10>8>3,这时10除以8的余数则比10除以3的余数大10>9>3,这时两者相等A purchase plan for a stereo receiver requires 20 percent of the total cost as a down payment and monthly payments of $30.题目没说要一共付几个月,所以无法确定总价,也就无法与450比大小了In a certain two-digit number,the units' digit is twice the tens' digit.一个两位数的个位数字是十位数字的两倍,那么十位数字肯定比5小,否则个位数字就大于或等于10了.

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