Can you divide the shape up with just three lines in order to ensure just one of each size of circle in each region?

The puzzle on the right is already solved, and shows a variation where lines don't need to fully cross the outer shape from side to side. Another sample is given below.

Sample Subdivision puzzles (click to view press-ready PDF version):

Subdivision puzzle

Visual & Picture puzzles

Choose a main puzzle type to view sub-categories, variations and samples:

Colour by Pixel

Colour by Shape

Colour by Sticker

Dot-to-dot

Identical Pairs

Jigsaw Cut

Matchsticks

Mazes

Reassembly

Subdivision

Various others