Use the fact that 4 and 7 have no common prime factors. If you run both timers at the same time, restarting each one whenever it rings, then sooner or later the seven-minute timer will go off two minutes after the four-minute timer did - and then you're in business.
In detail:
m0: start both timers
m4: timer 4 rings, restart it
m7: timer 7 rings, restart it
m8: timer 4 rings, restart it
m12: timer 4 rings, start cooking the egg
m14: timer 7 rings, restart it
m21: timer 7 rings, take out the egg.
The egg went in at minute 12 and came out at minute 21 - nine minutes of cooking.
This works because the 7-minute timer rang two minutes after the 4-minute timer did; the seven-minute timer times the last stretch. You can also make the 4-minute timer time the last stretch, and this is actually quicker (I just realized):
m0: start both timers
m4: timer 4 rings, restart it
m7: timer 7 rings, put in the egg
m8: timer 4 rings, restart it
m12: timer 4 rings, restart it
m16: timer 4 rings, take out the egg
The egg went in at minute 7 and came out at minute 16, which means it cooked for nine minutes.
I would use my watch, or the timer function of my microwave. Or you can start both timers at the same moment, before putting the egg in the water. When the 3-minute timer ends, put the egg in. This leaves 2 minutes on the 5-minute timer, assuming both timers are relatively accurate. When the 5-minute timer ends, re-set it again for 5 minutes, and you will have your 7 minute egg when the timer ends.
It would help if the question made sense!
No you cannot boil an egg with a cell phone.
To hard boil 15 medium size hens eggs will take 10 minutes if you put them all in the same pan and boil them at the same time.
Because it takes a few minuets for the rods inside to heat up so it can begin to boil the water inside there for you have hot water
Boiling an egg takes a while. Once the water starts to boil and the eggs are inside the boiling water, let the eggs boil for about 5 to 10 minutes. Careful, if they boil for too long, they might crack. Alternatively, bring the eggs and water to a boil. Remove from the heat, cover, and let sit for 25 minutes. Then, dump the water and rinse with cold water. Alternatively, buy an egg timer--there is a nifty one that is red plastic that turns purple when the eggs are done.
The greenish ring is due to an iron and sulfur which forms when eggs are overcooked or not cooled quickly enough. To avoid this from happening, set a timer to boil eggs.
The items need for hard boiling eggs are a very simple list. One would need a pan to hold the water and put it on the stove to boil. Next you would need some eggs to put into the water once it is boiling and a timer to time the eggs to make sure they are done.
30 gallons
The word 'boil' is both a noun (boil, boils) and a verb (boil, boils, boiling, boiled).Examples:He brought a kettle of water to the boil. (noun)She developed a painful boil on her leg. (noun)I can boil your eggs or fry them. (verb)
Well, there is no difference in terms of the act of "boiling," but there is a grammatical difference. Saying "bring it to the boil" is unnecessary. There is no need for using the definite article "the" for "boil". Merely say or write "bring to boil" or "boil." These are good enough.
The word for bringing to a boil is "boil" or "bring to a simmer."