Can you match up these equivalent algebraic expressions?
The 30 students in a class have 25 different birthdays between them. What is the largest number that can share any birthday?
Weekly Problem 31 - 2008
The flag is given a half turn anticlockwise about the point O and is then reflected in the dotted line. What is the final position of the flag?
The net shown here is cut out and folded to form a cube. Which face is then opposite the face marked X?
Can you work out the sum of the missing digits in this subtraction?
Given any positive integer n, Paul adds together the factors of n, apart from n itself. Which of the numbers 1, 3, 5, 7 and 9 can never be Paul's answer?
How far away was the lightning if the flash and the thunderclap were 6 seconds apart?
These four touching circles have another circle hiding amongst them...
Weekly Problem 30 - 2007
Three-quarters of the area of the rectangle has been shaded. What is the length of x?
