Brain logo . Puzzles
Brain Trainer
by William Armstrong
21 Jul 2012
to Keep Your Mind Young and Agile Phone: 661-272-9393
Home | Book | Puzzles | Brain | Links | About Us


About the Book


Brain Functions


About Us

Card Proof Puzzle

Genre: Logic Puzzle Rating: 4 - Medium Source: Unknown
Brain Functions: Logical Thinking, Analysis Hint    Solution

You know that each of the four cards shown below have a number on one side and a color on the other side. You see 2, 3, blue, and red. I suggest that every card with an even number has a blue back. What is the smallest number of cards you would have to turn over to decide if my suggestion was false? Which card(s)?

Card Proof Puzzle

Brainteasers for your mind

Home | Book | Puzzles | Brain | Links | About Us

All Rights Reserved.
Copyright © 2012 William Armstrong
39864 Golfers Drive, Palmdale, CA 93551 USA