Question: Of the 100 soccer balls that Nova went to inflate, 40 percent had holes in them and could not inflate, while 20% of the remaining balls were overinflated and exploded. How many balls were inflated successfully and could be used?
Answer: Step-by-step reasoning process: If 40% of the balls had holes in them and could not inflate, their number was 40 / 100 * 100 = 40. The remaining balls that Nova could inflate were 100 - 40 = 60. While inflating, 20% of the good soccer balls were overinflated and exploded up, a total of 20 / 100 * 60 = 12. The number of soccer balls that inflated successfully and could be used is 60 - 12 = 48.
So the answer is 48.

Question: Ray buys a pack of hamburger meat for $5.00, a box of crackers for $3.50, 4 bags of frozen vegetables at $2.00 per bag and a pack of cheese for $3.50 at the grocery store. Because he is a store rewards member, he gets 10% off of his purchase. What does his total grocery bill come to?
Answer: Step-by-step reasoning process: He buys 4 bags of frozen vegetables for $2.00 a bag so that’s 4 * 2 = $8.00. The meat is $5.00, the crackers are $3.50, the vegetables are $8.00 and the cheese is $3.50 for a total of 5 + 3.50 + 8 + 3.50 = $20.00. He gets 10% discount on his $20.00 purchase so that’s .10 * 20 = $2.00 off. His final grocery bill will be 20 - 2 = $18.00.
So the answer is 18.

Question: The price of two kilograms of sugar and five kilograms of salt is $5.50. If a kilogram of sugar costs $1.50, then how much is the price of three kilograms of sugar and a kilogram of salt?
Answer: Step-by-step reasoning process: Two kilograms of sugar is priced at $1.50 x 2 = $3. Three kilograms of sugar is priced at $1.50 x 3 = $4.50. So five kilograms of salt is priced at $5.50 - $3 = $2.50. Thus, a kilogram of salt is priced at $2.50 / 5 = $0.50. Hence, three kilograms of sugar and a kilogram of salt.s price is $4.50 + $0.50 = $5.
So the answer is 5.

Question: In a house of 15, 3/5 of the people eat pizza. If Aviana brought pizza with 50 pieces, and each person eating pizza took 4 pieces, calculate the number of pizza pieces that remained.
Answer:
Step-by-step reasoning process: If there are 15 people in the house, the number of people eating pizza is 3 / 5 * 15 = 9 people. If each house member who eats pizza took four pieces to eat, the number of pieces taken is 4 * 9 = 36 pieces. Since the total number of pieces was 50, the number of pieces not taken is 50 - 36 = 14 pieces.
So the answer is 14.