1 out of 3
Sequences of multiples keep cropping up...
1 out of 3
Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a parallelogram.
2 out of 3
How did the the rotation robot make these patterns?
2 out of 3
Caroline and James pick sets of five numbers. Charlie tries to find three that add together to make a multiple of three. Can they stop him?
2 out of 3
If you can copy a network without lifting your pen off the paper and without drawing any line twice, then it is traversable. Decide which of these diagrams are traversable.
2 out of 3
Jo has three numbers which she adds together in pairs. When she does this she has three different totals: 11, 17 and 22 What are the three numbers Jo had to start with?”
2 out of 3
It would be nice to have a strategy for disentangling any tangled ropes...
2 out of 3
If you have a large supply of 3kg and 8kg weights, how many of each would you need for the average (mean) of the weights to be 6kg?
2 out of 3
What's the largest volume of box you can make from a square of paper?
2 out of 3
Can you do a little mathematical detective work to figure out which number has been wiped out?
