Average Problems( Week 9 Evaluation) 1. What is the natural number comes exactly in the middle between 10 and 20? 2. There will be a canoe race. The blue team has 5 canoes. The yellow team has 9 canoes. The green team has 4 canoes. What is the average number of the canoes in a team? 3. A sheep pen holds 12 sheep and another sheep pen holds 10 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. Jane is 18 years old, and Steve is 26 years old. How old will Steve be when Jane is 31 years old? 5. What is the number with the same distance from 0 and 710? 6. Martha has 52 marbles, and Sofia has 14 marbles. How many marbles does Martha need to give Sofia so that each of them has the same number of the marbles? 7. There were 8 boys with the heights of 38 inches, 40 inches, 42 inches, 44 inches, 46 inches, 48 inches, 50 inches, and 52 inches respectively. What is their average height in inches? 8. A book shelf has four layers. There are 43 books on the first layer. There are a total of 72 books on the second and third layer. There are 45 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 + ... + 85 + 86 =? |