Some paradoxes don’t just challenge logic, they completely break it. These puzzles create situations where something must be both true and false at the same time. Philosophers, mathematicians, and ...

These low-floor, high-ceiling problems support differentiation, challenging all students by encouraging flexible thinking and ...

Try your hand at these tricky visual puzzles and give your brain a boost!

Mode = the most frequently occurring number in the set. (Note: if there are multiple most frequently occurring numbers in a dataset, the mode is not unique. All modes in this puzzle are unique) Range ...

Do you belong in the 1% Club? Let’s find out.In this quiz, you’ll face 30 questions inspired by The 1% Club TV game show. They start off nice and easy… but don’t get too comfortable - each round gets ...

Take the pressure off of problem-solving with engaging thinking games that encourage students to work together to find ...

Add Yahoo as a preferred source to see more of our stories on Google. If the cards shown here are rearranged to form four new poker hands of five cards each, what is the lowest possible winning or ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Eric's career includes extensive work in ...

If the cards shown here are rearranged to form four new poker hands of five cards each, what is the lowest possible winning or tying hand? When two hands are of the same type, such as a pair or a ...

CHICAGO — Allie Hays’ friends had a good laugh when they heard about the class she had signed up for at North Central College in Naperville, Ill.: Mathematics of Square Dancing.