1. Dara O'Briain's School of Hard Sums
2. Mathematics

Can One and friends escape the Lair of Shares?

Twelve helps the Numberblobs work out how many tokens they need for each fairground ride.

Super-speedy Eighteen discovers a faster way to add a number together lots of times.

Can Sixteen to Twenty sneak past the robot guards at the Museum of Numbers?

The Numberblobs challenge Twenty to a singing count-off.

Rocket Ten and friends blast off into space for a rhyming adventure to visit planets 11 to 20.

Time to get the party started by counting from sixteen to twenty.

Are you ready for the big dance number? Numberblock Twenty struts his stuff and dances the Two Tens Tango.

Numberblock Nineteen discovers she's a one-off with a hidden talent for shape-shifting.

Super-rectangle Eighteen shows the others how to ride the rays on the super-duper looper.

Meet Eighteen, the super speedy super-rectangle who was born to ride the rays.

Meet the artist known as Seventeen, who likes to paint 17 of everything.

Things get totally out of hand at a Square Club meeting, until a certain someone arrives to save the day.

Meet the really big square who always gets the party started: Sixteen!

It's all about balance as the Numberblocks try to make it across a very wobbly bridge.

Welcome to Ten's Place, where trainer Ten puts her friends through their paces with a high-energy number workout.

When their numberlings fall off, the Numberblocks have to work out who they are and how numbers work.

The Numberblocks put on a talent show full of terrific number tricks - but it doesn't quite go according to plan.