


8th Grade Worksheet9
1.Compute: (√ 2^{3})^{4/3}
2.If J = 20 · 30 · 50 · 70 · 90 · 110 · 130, then the smallest prime number that is not a factor of J is
3.The point (10, 0) is 10 units from the origin. Give a point, as an ordered pair (x, y), that is also 10 units from the origin such that both coordinates x and y are positive whole numbers and x < y.
4.What is the positive difference between the sum of the first fifteen positive even numbers and the sum of the first fifteen positive odd numbers?
5.Mr. Tom begins at the origin (the point (0, 0)) of a Cartesian plane, facing in the positive x direction. He takes two steps forward, turns 90 degree to its right, takes three steps, turns around (180 degree), takes five steps, and finally turns 90 degree to his left and takes nine steps. Assuming each of his steps is the same length, in which quadrant does Mr.Tom end up?
6.On planet Penev, the symbol {} is defined as follows : {x/y} = (1)^{x+y}. Compute {2/4}
7.What is the number halfway between 1/13 and 1/9?
8.Moody has 7 coins, which together make 72 cents. Each coin is a penny, nickel, dime or quarter. Then, the number of dimes Moody has?
9.Peterson can sing 120 notes every minute, while Ronald can sing 180 notes every minute. If Peterson and Ronald begin singing at the same time, how long, in seconds, will it take for their combined note total to equal 1080 notes?
10. Jessy took a test with 25 questions. For every question she got right, she earned 4 points, and for every question she got wrong, she lost 1 point. She answered every question, and got a score of 80. How many questions did she get right?
1. 4 2. 17 3. (6,8) 4. 15 5. II 6. 1 7. 11/117 8. 1 9. 216 10. 21

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