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Memory Challenge: Sailing Flags that Represent Numbers

While the much of the world uses values 1, 2, and 3, there are many ways to display numbers. This activity shows you the way flags are used to represent numbers. These flags have been used by sailors for many years. They let other ships know information and numbers without any signaling. Match the flags and the cards disappear.

Good luck and have fun.


Our NumberNut memory challenges are a good break from the usual quizzes. Your goal is to match two (2) cards on the screen. Once you start the game, all of the cards will display. Click on two cards. If they reveal the same value, they will disappear. If they don't match, you will need to click on another two cards.

Once you have found all of the matching pairs, the cards will be gone and the activity will be over. If you want to play again, you will match the same values but the cards will be in different places. It's always a random challenge.

- Shapes and Colors
- Pick-a-Card: Colors
- Memory Challenge: Colors
- Memory Challenge:: Web Colors
- Memory Challenge: Maritime Flag Numbers
- Memory Challenge: 2-D Shapes
- Memory Challenge: 2-D Shape Names
- Pick-a-Card: 2-D Shapes
- Memory Challenge: 3-D Shapes
- Pick-a-Card: 3-D Shapes
- QuickQuiz: Comparing Traits

Basic Math Topics
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- Numbers
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- Subtraction
- Multiplication
- Division
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