2 out of 3
Heidi and Peter pass two signs which say how far their destination is. How long will it take them to get there?
2 out of 3
Each digit of a positive integer is 1, 2 or 3, and each of these occurs at least twice. What is the smallest such integer that is not divisible by 2 or 3?
2 out of 3
When coins are put into piles of six 3 remain and in piles of eight 7 remain. How many remain when they are put into piles of 24?
1 out of 3
Weekly Problem 23 - 2010
These numbers have been written as percentages. Can you work out which has the greatest value?
2 out of 3
How many solutions can you find to this sum? Each of the different letters stands for a different number.
1 out of 3
A pattern repeats every six symbols. What are the 100th and 101st symbols?
2 out of 3
Repeat a pattern of numbers to form a larger number. Can you find the sum of all the digits?
2 out of 3
Weekly Problem 53 - 2012
ABCDEFGHI is a regular nine-sided polygon (called a 'nonagon' or 'enneagon'). What is the size of the angle FAE ?
