Art of Problem Solving - I have two egg timers: One egg timer tells me when 7 minutes has passed, and the other egg timer tells me when 11 minutes has passed.
11 Minute Alarm Clock Timer Stopwatch Vector Time Symbol 11 Minute Vector Icon Flat Illustration Stock Illustration - Download Image Now - iStock
![If you have a 7-minute hourglass and an 11-minute hourglass, how can you boil an egg in exactly 15 minutes? : r/puzzles If you have a 7-minute hourglass and an 11-minute hourglass, how can you boil an egg in exactly 15 minutes? : r/puzzles](https://preview.redd.it/uk5wi2n674k81.jpg?width=640&crop=smart&auto=webp&s=8a00a53cf6801c9f5432166f79394b79a22b2f1f)
If you have a 7-minute hourglass and an 11-minute hourglass, how can you boil an egg in exactly 15 minutes? : r/puzzles
![Vintage analog kitchen countdown timer with classical clock face and red remaining time display, 11 minutes left, close up shot with copy space Stock Photo - Alamy Vintage analog kitchen countdown timer with classical clock face and red remaining time display, 11 minutes left, close up shot with copy space Stock Photo - Alamy](https://c8.alamy.com/comp/KFM9FC/vintage-analog-kitchen-countdown-timer-with-classical-clock-face-and-KFM9FC.jpg)
Vintage analog kitchen countdown timer with classical clock face and red remaining time display, 11 minutes left, close up shot with copy space Stock Photo - Alamy
![The 11 Minutes Icon Isolated on White Background, Clock and Watch, Timer, Countdown Symbol, Stopwatch, Digital Timer Vector Icon Stock Vector - Illustration of interval, button: 133736818 The 11 Minutes Icon Isolated on White Background, Clock and Watch, Timer, Countdown Symbol, Stopwatch, Digital Timer Vector Icon Stock Vector - Illustration of interval, button: 133736818](https://thumbs.dreamstime.com/z/minutes-icon-isolated-white-background-clock-watc-minutes-icon-isolated-white-background-clock-watch-timer-133736818.jpg)