Work mathematically with rates to calculate an escape given increasingly difficult timings.

The Rate Escape
Can you navigate the deadly rings?
Watch the clock at the top right while the rings turn. You can only launch at full turn of the clock (i.e. one clock cycle), but will you make it through the rings? The merest touch and your ship will explode! Study the rotation rates below and calculate how long you should wait before blasting off to safety. A perfect score is 100 — see how you go.

Ring rotation rates in degrees per clock cycle:

Launch every: