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Petals

GCD & LCM · 30 levels

Pick the gears that draw the target rosette.

How to play

1. Pick a wheel (and on later levels a ring), then tap Draw. The wheel rolls round inside the ring and its pen draws a rosette.
2. Find the gcd, the biggest number dividing both tooth counts. Petals = ring ÷ gcd; loops (trips round before the line closes) = wheel ÷ gcd.
3. Draw exactly the target: the right number of petals, and of loops when the target shows them.

Ring 36 and wheel 16 share 4 (gcd 4): 36 ÷ 4 = 9 petals, 16 ÷ 4 = 4 loops. Ring 18 with wheel 8 draws the very same rosette.

Open Petals

Teeter, Tint and Echo Heist are free starters. Other games unlock through earned game choices or permanent packs. Your progress stays in the browser; optional sign-in saves it to your website account.