Problem #25

Given the set of natural numbers, {1, 2, 3, 4,…}, find the 2010^th number in this set that is not divisible by 2 or 3.

Problem #24

Russell has $7.85 in nickels, dimes and quarters.  He has nine more quarters than nickels.  If Russell has at least one of each type of coin, what is the difference between the most number of coins and the least number of coins that Russell can have?

Problem #23

Let A(2, 0), B(3, 5) and C(0, c).  Find all of the values of c that make triangle ABC a right triangle with the right angle at point C.