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#1 2010-06-24 23:39:44
- rkonweb
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its tof to answer ?
1+3+5+7+9+11+13+15+17+19=100
pick any five digit and by adding them total should be 50.
u can use one digit at once.....
thanks in advance
#2 2010-06-24 23:48:57
- bobbym
- Administrator
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Re: its tof to answer ?
Hi rkonweb;
Unless you do something other than just pick from {1,3,5,7,9,11,13,15,17,19} the problem has no solution. 5 odd numbers added together equal an odd number and 50 is not odd.
One answer I found is:
1 + 4 + 9 + 17 + 19 = 50 but it has a 4 which is not in {1,3,5,7,9,11,13,15,17,19}
There are others.
In mathematics, you don't understand things. You just get used to them.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.
#3 2010-06-26 07:37:15
- aawood
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Re: its tof to answer ?
As you say, adding any 5 odd numbers would make it impossible, but he mentioned any 5 digits rather than numbers. We can therefore use that to get 4 odd numbers using 5 digits from the sequence that add up to 50. One I found was 1 + 5 + 9 + 35.
#4 2010-06-26 07:42:54
- bobbym
- Administrator
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Re: its tof to answer ?
H aawood;
Yes, there are other ways if we begin to interpret the question. How do we know that is what he wants. So far, 3 different answers, all of them correct. Maybe, he wants something else.
Based on his first statement:
1+3+5+7+9+11+13+15+17+19=100. It looks like he figured since 10 odd numbers can sum to 100 and since 50 is 1/2 of a hundred so maybe 5 odd numbers can sum to 50?
Welcome to the forum!
Just between you and me you might have what he wants. But look at this, supposedly a mensa quiz question answer for this problem.
Which is not quite correct, should read:
If you google for this you will find many other strange answers.
In mathematics, you don't understand things. You just get used to them.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.