Least & Most( Week 37 Evaluation) 1. Richard plans to plant trees along the 12-meter long road side in front of his shop. At most how many trees can be planted along the road if a 2-meter distance between every two trees is required? 2. The students in a class were asked to answer two Math questions. 15 of them answered the first question correctly and 14 answered correctly for the second question. 8 of them answered both questions correctly. At least how many students were in the class? 3. Hillary has 4 pairs of socks (each pair is unique) in a drawer. How many socks will she need to take out from the drawer in order to make sure to find a pair of socks? 4. A snack costs 61 cents. If you want to pay it with coins, at least how many pennies are there in the coins? 5. There are 3 red cards and 4 yellow cards in a box. At least, how many cards do you need to pick out of the box at the same time to make sure that there are two cards with different colors? 6. There are 7 red balls, 10 green balls and 11 blue balls in a bag. At least how many balls do you need to pick from the bag (without returning the balls back to the bag) in order to make sure that you have balls of all three colors? 7. Alice has 15 different pairs of socks in a drawer. At most, how many socks can she take out from the drawer before finding a pair of socks? 9. There are 15 balls of 5 colors with 3 balls per color in a bag. At least how many balls need to be picked to make sure there are two balls of the same color? 10. It will take a clock 8 seconds to chime 5 times. At least how many seconds will it take to chime 9 times? Note that chiming does not take time and the interval between two chimings is the same. |