Consider the Q and A. Q: A store sells pencils and erasers. It has a rule that for every pencil you buy, you must buy 2 erasers which cost 1/2 the price of the pencils. If they sold 20 pencils and earned $80, how much do erasers cost?
A: 1
What is the step-by-step reasoning process?
Step-by-step reasoning process: They sold 40 erasers because 20 x 2 = 40. Therefore 20(Pencil Price) + (1 / 2)(40 x Pencil Price) = 80. Therefore 40(Pencil Price) = 80. Therefore (Pencil Price) equals 2 because 80 / 40 = 2. An eraser costs $1 because 2 / 2 = 1.

Consider the Q and A. Q: Billy wants to watch something fun on YouTube but doesn't know what to watch. He has the website generate 15 suggestions but, after watching each in one, he doesn't like any of them. Billy's very picky so he does this a total of 5 times before he finally finds a video he thinks is worth watching. He then picks the 5th show suggested on the final suggestion list. What number of videos does Billy watch?
A: 65
What is the step-by-step reasoning process?
Step-by-step reasoning process: Billy has 15 suggestions generate for him 5 times for 15 * 5 = 75 videos. There are 15 - 5 = 10 shows in the final set of suggestions he doesn't consider. This means he picks the 75 - 10 = 65th show YouTube suggests.

Consider the Q and A. Q: Yanni has $0.85. His mother gave him $0.40 in addition. While going to the mall, Yanni found $0.50. He bought a toy that cost $1.6. How much money in cents did Yanni have left?
A: 15
What is the step-by-step reasoning process?
Step-by-step reasoning process: Yanni's mother gave him $0.40 in addition to $0.85 for a total of $0.40 + $0.85 = $1.25. Yanni found $0.50 so he had a total of $1.25 + $0.50 = $1.75. Therefore, Yanni had $1.75 - $1.6 = $0.15 left. 100 cents make $1 so $0.15 is 100 * 0.15 = 15 cents.

Consider the Q and A. Q: There are 4 puppies and 3 dogs at a camp. Each dog eats twice as much food as a puppy, but each puppy eats three times as often as a dog. If a dog eats 4 pounds of food three times a day, what would be the total amount of food the dogs and puppies eat in a day?
A: 108
What is the step-by-step reasoning process?
Step-by-step reasoning process:
Eating three times a day, a dog eats 3 * 4 = 12 pounds of food. Since there are 3 dogs at the camp, the total amount of food they eat is 3 * 12 = 36 pounds of food in a day. If each dog eats twice as much food as a puppy, a puppy will eat 4 / 2 = 2 pounds of food in one meal. Each puppy eats three times as often as a dog, and if a dog eats three times in a day, a puppy will eat 3 * 3 = 9 times in a day. Since a puppy eats 2 pounds of food a day, the total amount of food a puppy will eat in a day is 9 * 2 = 18 pounds of food. Four puppies in the camp eat 18 * 4 = 72 pounds of food every day. Together, the dogs and the puppies eat 72 + 36 = 108 pounds of food in a day.