There are to be 6 homes built on a new development site. They could
be semi-detached, detached or terraced houses. How many different
combinations of these can you find?
Start with four numbers at the corners of a square and put the
total of two corners in the middle of that side. Keep going... Can
you estimate what the size of the last four numbers will be?
Find a great variety of ways of asking questions which make 8.
Many of you sent us answers for this problem but very few gave us details about how you solved it. Please do try to explain how you reach your solutions.
Stephen, who is home-educated, told us:
However, the Junior Class at Ysgol Bryncrug in Gwynedd, Wales sent an extremely well-explained solution:
What fantastic logical reasoning, well done. I like the way you have gone through each possible top number in order. Having a system like that ensures that you find all the solutions.