Average Problems( Week 9 Evaluation) 1. What is the natural number comes exactly in the middle between 20 and 28? 2. There will be a canoe race. The blue team has 6 canoes. The yellow team has 8 canoes. The green team has 4 canoes. What is the average number of the canoes in a team? 3. A sheep pen holds 14 sheep and another sheep pen holds 8 sheep. To make each sheep pen hold the same number of sheep, how many sheep need to be moved from one sheep pen to the other sheep pen? 4. Hillary is 16 years old, and Ben is 24 years old. How old will Ben be when Hillary is 32 years old? 5. What is the number with the same distance from 0 and 700? 6. Helen has 78 marbles, and Emily has 44 marbles. How many marbles does Helen need to give Emily so that each of them has the same number of the marbles? 7. There were 9 boys with the heights of 43 inches, 45 inches, 47 inches, 49 inches, 51 inches, 53 inches, 55 inches, 57 inches, and 59 inches respectively. What is their average height in inches? 8. A book shelf has four layers. There are 61 books on the first layer. There are a total of 69 books on the second and third layer. There are 50 books in the fourth layer. How many books are there in average on a layer of the shelf? 9. A 12-hour clock chimes once at 1:00, twice at 2:00, three times at 3:00, etc. In addition, the clock chimes once at half-past each hour. How many times does the clock chime altogether in one 12-hour period? 10. Find the sum of 1 + 2 + 3 + 4 + ... + 49 + 50 =? |