Warmup

The warmup challenges are intended to get you familiar with the way Capture the Ether works and the tools you need to use.

Lotteries

Feeling lucky? These challenges will show how hard it is to run a fair lottery.

Math

These challenges use a variety of techniques, but they all involve a bit of math.

Accounts

These challenges test your understanding of Ethereum accounts.

Miscellaneous

These challenges defy categorization.