Compare Numbers < 20

Tower of Daredevils
November 13th, 2022

Have you ever had a piggyback on someone’s shoulders? Now imagine being 5 or 6 people high and doing that! That’s similar to what people in Spain do every year when they build castells, or human towers. Read on to see how the numbers in people-stacking really, well, stack up.

Give Me a High Five — or Fifty
October 12th, 2022

Starfish usually have 5 legs. But did you know that some types of starfish have up to 50 legs? Read on to get a leg – or 20 – up on the math in starfish!

If Your Car Had Arms and Legs
October 9th, 2022

We have lots of robots in our lives, but we bet there are few as cool as this real-life Transformer car! Read on to see how it works, and discover the math in these mutating cars.

The Tree You Can’t Hug
August 25th, 2022

If you’ve ever hugged a tree all the way around, we bet it was not a sequoia. Sequoias are huge trees! So naturally there’s a lot of math in them. Read on to discover the numbers in these towering trees.

Swimming Through Bricks
August 24th, 2022

When you look in a river or stream, sometimes you see fish swimming around. But you don’t usually expect to see a giant fish sticking out of a building when you look up! That’s probably why this sculpture sticking through a building in Portland, Oregon is so eye-catching. Read on to find out about this flying fish sculpture and swim through the math.

Tongue Twister for Your Eyes
August 3rd, 2022

Does this picture look right to you, or does something seem a little strange about it the more you read the words? Read on to see why this optical illusion trips up your brain and eyes – and do the colorful math!

Where Every Day Is Your Birthday
July 28th, 2022

Bedtime Math fan Ben W. asked us, which planet has the longest day? Read on to find out the answer, and see where you’d get to celebrate the most birthdays!

Cross-Country Crawl
June 30th, 2022

Bedtime Math fan Sara D. asked us, how long would it take for an army of ants to pick her up and carry her across the U.S.? Read on to find out – and march through the math of mighty ants!

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