Question 527848
This is just something that is done by trial and error.


One thing to point out is that B+C = C+B (since addition is commutative), but notice how C+B = A (in column 3) and B+C = B (in column 2). So this means that a carry is happening. It also implies that B = A+1 (since the largest carry possible is 1)



So because a carry is happening, we know that either B or C is at least 5. In addition, we know that A+A = C. So A must be less than 5 (since C is a single digit number).



These notes help reduce the selection field.



So use trial and error, and stay restricted to the notes above, to find that the answer is


A = 4


B = 5


C = 9



This then tells us that



459
+ 495
______
954 


If you need more help, email me at <a href="mailto:jim_thompson5910@hotmail.com">jim_thompson5910@hotmail.com</a>


Also, please consider visiting my website: <a href="http://www.freewebs.com/jimthompson5910/home.html">http://www.freewebs.com/jimthompson5910/home.html</a> and making a donation. Thank you


Jim