Search
problem
3 out of 3
Slightly Outnumbered
11 to 14
3 out of 3
If this class contains between $45$% and $50$% girls, what is the smallest possible number of girls in the class?
problem
2 out of 3
Bargain
14 to 16
2 out of 3
Weekly Problem 11 - 2013
A shop has "Everything half price", and then "15% off sale prices". What is the overall reduction in cost?
problem
2 out of 3
2011 Digits
14 to 16
2 out of 3
Weekly Problem 10 - 2014
What is the sum of the first $2011$ digits when $20 \div 11$ is written as a decimal?
problem
3 out of 3
Producing an Integer
14 to 16
3 out of 3
Multiply a sequence of n terms together. Can you work out when this product is equal to an integer?
problem
2 out of 3
Ratio Riddle
14 to 16
2 out of 3
Can you work out the ratio b:c given the ratios a:b and a:c?
problem
2 out of 3
Fractions of Fractions
14 to 16
2 out of 3
If you know that a fraction of X is the same as a different fraction of Y, can you work out X/Y?
problem
1 out of 3
Regular Vertex
11 to 14
1 out of 3
A square, regular pentagon and equilateral triangle share a vertex. What is the size of the other angle?