Can You Guess Which Flag Comes Next in This Puzzle?

Make sure you study the colors of the flags very closely.

FlagsBrain snack®/Peter FrankAre you up for a challenge? This puzzle might stump you, but those with an observant eye will be able to solve it (and, you’ll most likely spot the one image that is not like the others in this puzzle, too.)

This illustration is made up of 15 flags but one is left out. Which signal flag (1-5) should replace the question mark in order to complete this unique series? Make sure that you take it all in. The colors of the flags, their patterns, which way the stripes go, how many colors each flag is.

Solve it yet? Which number flag did you guess? If you guessed number three, then you are correct. But why? It’s because flag number 3 is the only flag that hasn’t been shown yet. If you chose one, two, four, or five then there would have been two of the same flag in the illustration.

Got that right and feeling like a puzzle genius? Try figuring out how many triangles are in this image.

Mind-stretchersCourtesy of Brainsnack®

To test your brain even more, purchase your own copy of Mind Stretchers Volume One. Puzzle editor Allen D. Bragdon keeps you on your toes with over 150 puzzles.

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Originally Published in Mind Stretchers Volume I

Morgan Cutolo
Morgan is an Associate Editor at Reader’s Digest. She graduated from the University of New Hampshire in 2016 where she received her Bachelor of Arts in Journalism. She writes for, helps lead the editorial relationship with our partners, manages our year-round interns, and keeps the hundreds of pieces of content our team produces every month organized. In her free time, she likes exploring the seacoast of Maine where she lives and works remotely full time and snuggling up on the couch with her corgi, Eggo, to watch HGTV or The Office.