Combination( Week 39 Evaluation) 2. You can make 6 three-digit numbers using 1, 6 and 8. What is the difference between the biggest number and the smallest number? 3. You can make 6 two-digit numbers using 1, 5 and 8. What is the difference between the biggest number and the smallest number? 4. Kevin has 2 choices of roads from home to school. There are 4 choices of roads from school to library. How many choices of roads does Kevin have to go from home to school, then to the library? 6. There are 5 people in a team. If they will shake hands with each other only once during a meeting, how many handshakes will be made in total? 7. There are 4 cards with numbers 2, 3, 4, and 5 on them. These 4 cards were put in a box. You are asked to randomly pick up two cards each time to form a two-digit number (and then cards are put back). How many different two-digit numbers could you make? 8. Emily has 4 shirts of different colors and 3 skirts of different colors. How many ways can she dress up? 9. In a chess tournament, there are 4 players. Each player will play a game with each other. How many games will be played in total? 10. It is a picture day. There are 5 children in a class. Each child will take a photo with every other child in the class. How many photos will be taken for the entire class? |