Ideal for children aged 7 to 11 (KS2), this fun-filled addition and subtraction-themed puzzle book allows children to test their numeracy skills again and again, with a built-in `reveal the answers' feature that uses a moire device.
Join Sherlock Bones and Dr Catson on an incredible arithmetic adventure.
Use your addition and subtraction skills to foil Professor Moriratty's evil plan and solve a teasing trail of numeracy-themed puzzles along the way.
Check your answers with Sherlock's Secret Solver and earn mathematical medals as you progress.
Features numbers in the KS2 curriculum.