Each clue in this Sudoku is the product of the two numbers in adjacent cells.
These eleven shapes each stand for a different number. Can you use the multiplication sums to work out what they are?
How many different number families can you find?
Nine squares are fitted together to form a rectangle. Can you find its dimensions?
What happens when we add together two complex numbers?
What happens when we multiply a complex number by a real or an imaginary number?
These Stage 3 and 4 problems have not yet been solved. Can you be the first?
These Stage 4 and 5 problems haven't been solved yet. Can you be the first?