This page is specifically for math students who participate, or are in, fifth grade. We will be posting math questions and problems for others to answer. Students can also ask each other questions about math homework and concepts. Please don't expect a timely reply.
Math is math... get used to it. (RF7 rm304)

Thursday, December 6, 2012

Eggs Anyone?

Suppose you have only two egg timers, a five-minute and a three-minute. Can you use these two measuring devices to time an egg that must be boiled for exactly two minutes?

dear mr. b you could use the three min one and then you would set it for two min so then it would be able to work unless the timer could only do three and five you would have to go get a different timer

yes because one timer is 3 minnutes and the other is 5 minnutes so if you add those two numbers you will get 8 minnutes so you can use the two measuring devises to time the egg for 2 minnutes exact.

yes because you could use only use the three minute one

ReplyDeleteno you can't if you use both timers and only that amount of time on the timer.

ReplyDeletelook at the timers when when there is only 3 min. on the 5 min. timer. then only 1 min.left on the 3 min. timer.

ReplyDeleteNo you cant because if you use both egg timers that will equal 8 minutes and you only need 2 minutes.So the egg will boil for to long.

ReplyDeletei think it is cofusing but i think it is posible beacuse the timmer goes to 5 mins and 3 mins and two is lower than both of those so it works.:)

ReplyDeleteyes because you can set one to 2 min.

ReplyDeletevm17rm304

DeleteI agree

You have to set it to 3 and 5 it cant be lower than those.

Deleteno becase if you have two egg timers one set foe 5 minnuts and you have one for 3 and they need to be done at two minnuts

ReplyDeleteyes because if you set it to two min and you set it also on 5 mins you can just wach the clock to see when it is 2 mins

ReplyDeleteyes you can because if you set them at the same time when the 3 min. timer is up the egg is done

ReplyDeletedear mr. b you could use the three min one

ReplyDeleteand then you would set it for two min so then it would be able to work unless the timer could only do three and five you would have to go get

a different timer

I guess in a way that you could you start them at the same time but dont put the egg in untill the three min one is done.

ReplyDeletei agree RF7rm304

DeleteExactly!

Deleteyes because,you can tell them if they both if they get the same!

ReplyDeletetake the 3min timer wait till it says1min left and take the eggs out

ReplyDeleteyes because one timer is 3 minnutes and the other is 5 minnutes so if you add those two numbers you will get 8 minnutes so you can use the two measuring devises to time the egg for 2 minnutes exact.

ReplyDeleteOr you could (because they are egg clocks) crack the toghether and try to get 2.

ReplyDeleteYes.

ReplyDeleteBecause you can use the 3 minute timer.

Then watch it for two minutes, leaving a minute remaining

i think the answer is 1

ReplyDeleteyou do 5-3=2 thats what i think

ReplyDeleteBoth, but you subtract 5:00 min.

ReplyDelete-3:00 min.

=2:00 minutes

start them at the same time than put the egg in when the 3 minute one is done. It's 5:00-3:00

ReplyDelete