This document contains 6 math word problems from the GRE quant section about arithmetic concepts. Problem 1 asks about adding salt solutions to reach a target percentage. Problem 2 asks about the number of dimes in a coin collection given the total money. Problem 3 is an age word problem involving one person being older than another. Problem 4 involves machines producing bolts at different rates. Problem 5 asks about finding the area of a shaded portion of a circle. Problem 6 asks to calculate a percentage of a number.