MathDB

1

Part of 2013 Online Math Open Problems

Problems(2)

2012-2013 Winter OMO #1

Source:

1/16/2013
Let xx be the answer to this problem. For what real number aa is the answer to this problem also aāˆ’xa-x?
Ray Li
Online Math Open
2013-2014 Fall OMO #1

Source:

10/30/2013
Determine the value of 142857+285714+428571+571428.142857 + 285714 + 428571 + 571428.
Proposed by Ray Li
Online Math Openfunction