An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
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?
Well done to Edison, from STC School in Hong
Kong, and to Esther, who both sent us correct solutions. Here is