Between Two Trains

Between Two Trains

This month we have another classic-style brain teaser.  This one requires some math, but as usual, it also requires some clever problem-solving and reasoning!  Enjoy! Two trains leave two towns that are 100 miles apart. They travel toward each other at rates of 30 mph...
Who Wins the Race?

Who Wins the Race?

As is often the case, this month’s brain teaser has a lot in common with typical, hard GMAT and GRE questions in ways that are explained in the solution to the question. This is another good one! Enjoy! Gary and Barry race in a 50 yard dash. Gary wins by 5 yards. They...
Birthdays in October

Birthdays in October

This month, for the first time, we are using an official question from the new version of the GMAT as our monthly “brain teaser”. As anyone who knows the GMAT will be able to tell, it’s indistinguishable from questions that appeared on the “Classic GMAT,” but if you...
A Lot of Letters

A Lot of Letters

My teacher posed the below question to our class on the last day of 5th grade. I remember puzzling over it and needing my father to help me solve it. Don’t cheat. Give yourself a chance. You can do this! What word has 1 n, 1 p, 2 l’s, 4 e’s, and 5 s’s? Answer:...
What Color is Your Hat?

What Color is Your Hat?

Three men, who are not wearing glasses, are placed in a room without mirrors. The men are told to close their eyes and then a hat is placed on each of their heads. The hat is either red or green in color. Once the hats are in place they are told to open their eyes....