Five numbers added together in pairs produce: 0, 2, 4, 4, 6, 8, 9, 11, 13, 15 What are the five numbers?
Weekly Problem 16 - 2012
If the odd numbers on two dice are made negative, which of the totals cannot be achieved?
Weekly Problem 47 - 2013
What is the value of the given expression?
Well done to Edison, from STC School in Hong
Kong, and to Esther, who both sent us correct solutions. Here is