Page 38 - Arithmetic

Exercise
1. If a quality inspector of a bulb company rejects 0.05% of the bulbs manufactured, how many bulbs should he examine to reject 3?
a) 2000 b) 4000 c) 6000 d) 8000 e) 9000
2. Sam gave 40% of his money to his wife, and he gave 20% of the remaining amount equally to his two daughters. Half of the money left was spent on his medical expenses and the leftover $18000 he deposited in the bank. How much money did Sam initially have?
a) $200,000 b) $175,000 c) $150,000 d) $250,000 e) $100,000
3. How many pounds of sugar should Harry add to 25 lbs of 4% solution of sugar and water to increase the solution to 10%?
a) 12 b) 22 33
c) 14 d) 24 33
e) Cannot be determined
4. How many liters of acid are there in 8 liters of 25% solution?
a) 1.8 liters b) 5.5 liters c) 3.2 liters d) 2 liters e) 2.5 liters
5. A bag is comprised of 200 black balls and 800 blue balls. If 15% of black balls and 20% of the blue balls are removed from the bag, what percentage of balls is removed from the bag?
a) 15% b) 19% c) 20% d) 35% e) 45%
Page 37 of 55
Arithmetic Concept