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 Post subject: sum is three digit
PostPosted: Wed, 18 Apr 2012 18:21:08 UTC 
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In how many ways we can add two, 3 digit numbers such that sum of the numbers is also three digit.

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 Post subject: Re: sum is three digit
PostPosted: Wed, 18 Apr 2012 21:10:07 UTC 
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mun wrote:
In how many ways we can add two, 3 digit numbers such that sum of the numbers is also three digit.


Write the digits of the first number as a, b, c and the second as c, d, e.

Then you want 100(a+d)+10(b+e)+c+f<1000

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