GRE Exam Numerical Ability Arithmetic

A team contributes total of $399 from its members. If each member contributed at least $10, and no one contributed $19, what is the greatest number of members the club could have?

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GRE Other Question

v, w, x, y, and z are five positive integers for which v ≤ w ≤ x ≤ y ≤ z. If the average (arithmetic mean) of the five numbers is 30 and their median is 25, what is the smallest possible value of z ? Usually Holly leaves home to school at 9:00, however today she left home 20 minutes later. In order to be at school on time she increased her usual speed by 20% and still was at school 15 minutes later than usual. What is her usual time from home to school?