Combination( Week 39 Practice) 2. You can make 6 three-digit numbers using 1, 6 and 7. What is the difference between the biggest number and the smallest number? 3. You can make 6 two-digit numbers using 2, 6 and 8. What is the difference between the biggest number and the smallest number? 4. Ed has 3 choices of roads from home to school. There are 4 choices of roads from school to library. How many choices of roads does Ed have to go from home to school, then to the library? 5. There are 6 locks and each with a key. However all the keys were messed up. At most how many tries will be needed in order to match a key to its lock? |