Mathematics Competition for Elementary School
1. Karl had salary reduced by 10%. He was later promoted and his salary was increased by 10%. If his original salary was $20.0000, what is his present salary ?
A. $ 16.200
B. $ 19.800
C. $ 20.000
D. $ 20.500
2. The prime numbers between 10 and 20 are added together to form the number Q. What is the larges prime divisor of Q ?
A. 2
B. 3
C. 5
D. 7
Answer ?
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Mathematics Olympiad: Circle
April 29, 2010 · Posted in Olympiad · 3 Comments
This problem is a mathematics olympiad problem for elementary school. The radius of each circle in the picture below is one unit.
Determine the area of L! (Phi = 3
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