TJ Prep Problems

TJ test prep practice problems  for our students and readers. The problems provide a very small sampling of what Optimal TJ Prep students work with.

A Percent Word Problem for TJ/Blair/SSAT/HSPT/AOS Prep. Target Time. 30 20-35 seconds.

Mr. Mathwiz builds and sells high-performance computers. He wishes to make a 40% profit. He also wishes to offer his customer the good feeling of getting a 30% discount from the list (sticker price). If it costs Mathwiz $300 worth of parts to build the computer. What should be the list (sticker) price Mathwiz should choose so that the customer gets a 30% discount and Mathwiz gets a 40% profit (look at the beauty of math)?