Working systematically

Design an arrangement of display boards in the school hall which fits the requirements of different people.

This task combines spatial awareness with addition and multiplication.

There is nothing half so much worth doing as simply messing about in boats...

Can you do a little mathematical detective work to figure out which number has been wiped out?

What happens when you add a three digit number to its reverse?

By selecting digits for an addition grid, what targets can you make?

Can you crack these cryptarithms?

Can you find ways to put numbers in the overlaps so the rings have equal totals?