Can you show this algebraic expression is divisible by 4?
Weekly Problem 10 - 2011
Will this product give a perfect square?
Weekly Problem 45 - 2012
There are 10 girls in a mixed class. If two pupils are selected, the probability that they are both girls is 0.15. How many boys are in the class?
Weekly Problem 24 - 2014
The square of a positive number is twice as big as the cube of that number. What is the number?
Weekly Problem 30 - 2014
What is the value of $2006 \times 2008 - 2007 \times 2007$?