An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
Roll two red dice and a green dice. Add the two numbers on the red dice and take away the number on the green. What are all the different possible answers?
Use the 'double-3 down' dominoes to make a square so that each side has eight dots.
Four bags contain a large number of $1$s, $3$s, $5$s and $7$s.
Can you pick ten numbers from the bags that add up to 37?
Click here for a poster of this problem
What Numbers Can We Make? is a suitable follow-up problem.