These alphabet bricks are painted in a special way. A is on one
brick, B on two bricks, and so on. How many bricks will be painted
by the time they have got to other letters of the alphabet?
I have forgotten the number of the combination of the lock on my
briefcase. I did have a method for remembering it...
Sam sets up displays of cat food in his shop in triangular stacks.
If Felix buys some, then how can Sam arrange the remaining cans in
Sam stacks cans in his shop in triangular stacks, one can deep,
(see the problem Cat
Jennifer from the Mount School York warned Sam that stacks of
cans like this are very likely to fall over. It's better to stack
in a pyramid: for example. $P_4$ has $16$ on the base, then $9$
then $4$ and finally $1$.