reverse Posted June 27, 2005 Share Posted June 27, 2005 Ok I can figure this out the hard way using substitutions, but who can come up with a super quick way to do it. Simple enough for a nine year old to comprendo. Two jars both exactly the same. One bag of beans. You tip four fifths of the beans into the first jar. You tip the remaining fifth into the second jar One jar- bean combo weighs 50 g and the other jar-bean combo weighs 20 g… Question…how much does one of jars alone weigh? Show your reasoning Link to comment Share on other sites More sharing options...
YT2095 Posted June 27, 2005 Share Posted June 27, 2005 10g is that fast enough? edit: sorry reasoning, erm I added the 2 together making 70 then waht did I have to take away to make 50 (as it`s in 5`ths) then I split the 20. Link to comment Share on other sites More sharing options...
reverse Posted June 28, 2005 Author Share Posted June 28, 2005 correct. but i'm not sure about the reason. how did you pull the double jar quantity out of the seventy? ther is no specific mention of the ratio of jar to bean. Link to comment Share on other sites More sharing options...
gnpatterson Posted June 28, 2005 Share Posted June 28, 2005 3 fifths of the beans is 50g - 20g = 30g therefore one fifth = 10g so the jar = 20g - one fifth = 10g Link to comment Share on other sites More sharing options...
gnpatterson Posted June 28, 2005 Share Posted June 28, 2005 How about this one I was three times the age of my brother five years ago and now I am just twice as old as he, how old am I now. can any one make this rhyme? Link to comment Share on other sites More sharing options...
YT2095 Posted June 28, 2005 Share Posted June 28, 2005 5 and no, not yet Link to comment Share on other sites More sharing options...
YT2095 Posted June 28, 2005 Share Posted June 28, 2005 I was 3 times as old as my Brother, but not the same age as my Mother, 5 years have past, and much to my rage, he`s now 50 percent of my age! howzat Link to comment Share on other sites More sharing options...
the tree Posted June 28, 2005 Share Posted June 28, 2005 I was three times the age of my brother five years ago and now I am just twice as old as he, how old am I now. 5If that were true then his brother would currently be 2.5 and five years back would have been -2.5, five years back he (speaker of the riddle) would have been 0 and 0 is not 3 time -2.5 so that must be wrong. 20 would make significantly more sense. Link to comment Share on other sites More sharing options...
YT2095 Posted June 28, 2005 Share Posted June 28, 2005 yeah I gave the little brothers starting age, sorry, either way, I got 20 to work that out as it starts when he`s 15 Link to comment Share on other sites More sharing options...
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