See Common Multiples
Explore how numbers work
Remix this projectPractise again
What is this activity?
Overlay coloured filters on the number board to see common multiples.
Let’s give it a try!
送信中です
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How to play
- Click the green flag to start.
- Tap the characters on the right to set the numbers.
- Tick two or three glasses filters and look for the white numbers.
倍数メガネ means “Multiples glasses”. Filters 1, 2 and 3 correspond to the three numbers on the right. The original instructions remain in Japanese.
For families and teachers
A number that belongs to every selected multiples sequence is a common multiple. Changing one filter can show why the intersection changes.
This English guide uses the original Chicodori Scratch project. Some labels remain in Japanese. You can explore and remix the project on Scratch.