Always a multiple? Think of a two digit number, reverse the digits, and add the numbers together. Something special happens... Age 11 to 16 Exploring and noticing Working systematically Conjecturing and generalising Visualising and representing Explaining, convincing and proving Being curious Being collaborative Being resourceful Being resilient Problem Problem Think of a two digit number, reverse the digits, and add the numbers together. Something special happens... Watch the videos and adapt the method to explain a variety of number tricks.
