When an old tree was felled, a very thin ring was detected among the oldest rings in the stump. When the width of rings, each corresponding to one year`s growth, was correlated with local rainfall records, it was found, as expected, that thicker rings had occurred in...
Once again we’re trying to illustrate the brain-teaser-esque nature of GMAT, GRE, SAT, and ACT questions. It tends to be easier to do that with Quantitative questions, but we wanted to illustrate the level of reasoning and critical thinking ability needed for Verbal...
Select for a and for b values such that the equation x/a=x-b has more than one solution for x. Make only two selections, one in each column. Answer:A=1 and B=0. This is a GMAT question from the Data Insights section and is technically not a brain teaser, but it is...
This month we have another classic-style brain teaser. This one requires some creative problem solving. The answer is a surprisingly small number, so give yourself a chance to work it out and don’t jump right to the answer! You have 9 marbles. 8 have the same weight...
Ashley and Cassandra drove their cars along the same route for 400 miles and then stopped at a gasoline station, where each purchased exactly the amount of gasoline needed to fill her car’s gasoline tank to capacity. If both cars began with full gasoline tanks,...
