You want to boil a two-minute egg. If you only have a three...............how can you boil the egg for only two minutes?

Question

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

Answer 1

3 minute hour glass and 5 minute hour glass is activated together
After 3 minute one empties, flip the 5. Now you have exactly 2 minutes left until sand stops flowing.