A hundred square has been printed on both sides of a piece of paper. What is on the back of 100? 58? 23? 19?
Exploring the structure of a number square: how quickly can you put the number tiles in the right place on the grid?
Can you go through this maze so that the numbers you pass add to exactly 100?
Amy has a box containing domino pieces but she does not think it is a complete set. She has 24 dominoes in her box and there are 125 spots on them altogether. Which of her domino pieces are missing?