Mathematics Challenge
Problem:
1. If 2x + y = 13 and x + 2y = 11, what is the value of x + y?
2. Determine the units digit of the integer equal to 9 + 92 + 93 + 94.
(The units digit of an integer is its rightmost digit. For example, the units digit of
the integer 1234 is 4.)
Answer ?
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October 22, 2010 | Filed Under MathforOlympiad | 1 Comment
Math Olympiad
Many comments on this blog who want to set shoptalk mathematics olympiad for both primary schools, junior and senior high school. Willingness to meet, in the post this time, I will give a link containing a collection of shoptalk Olympic level mathematics for elementary, junior and senior high school.
April 24, 2009 | Filed Under Olympiad | 23 Comments
