Math Challenge!

This past Wednesday morning, students from Grades 9, 10, and 11 wrote the University of Waterloo's Center for Mathematics and Computing's Pascal, Cayley, and Fermat mathematics competitions. In these contests, students have 60 minutes to complete 25 multiple choice questions of increasing difficulty. Each year more than 265,000 students from more than 80 countries register to write the Centre for Education in Mathematics and Computing (CEMC) contests. It was a delight to watch King's-Edgehill students take on this high level of mathematical challenge.

 

For those readers who are interested, below is an example problem from last year's Grade 9 contest. Enjoy!

How many integers between 100 and 300 are multiples of both 5 and 7, but are not multiples of 10?

 

(A) 1           (B) 2           (C) 3            (D) 4            (E) 5