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 Mathematics Problem for TJ/AOS/Blair Test Prep (Medium). Target Time. 25-45 seconds.

A school has sufficient funds to purchase 400 tablet computers for classroom use.  If the additional funds equal to the 20% of the original amount becomes available and the school is offered a 30% discount on the price of each tablet computer, the school will be able to purchase k% more computers than originally planned. What is the value of k?