A hundred square has been printed on both sides of a piece of paper. What is on the back of 100? 58? 23? 19?
How quickly can you put back the numbers on the hundred square? What's the smartest way to do it?
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?
These Stage 1 and 2 problems haven't been solved yet. Why not take a look?