Q: Ali and Sara ate 80 small apples combined. Ali ate 4 times more apples than Sara. How many apples did Sara eat?
A: Let A be the number of apples Ali ate and S be the number of apples Sara ate. We have: A + S = 80 apples. And: A = 4S. Which means: 4S + S = 80. So: 5S = 80. So the number of apples Sara ate is: S = 80 / 5 = 16 apples. The answer is 16.
Question: Kerry is ready to celebrate his birthday and wants to have three cakes with his age in candles on each of them. Candles come in boxes of 12 and cost $2.5 a box. If the candles cost $5, how old is Kerry?
Answer: He needed 2 boxes of candles, because 5 / 2.5 = 2. He needed 24 candles because 2 x 12 = 24. He is 8 because 24 / 3 = 8. The answer is 8.
[Question]Julie wants to give her favorite cousin a $2345 mountain bike for his birthday. So far, she has saved $1500. Since the birthday is still a few weeks away, Julie has time to save even more. She plans on mowing 20 lawns, delivering 600 newspapers, and walking 24 of her neighbors’ dogs. She is paid $20 for each lawn, 40 cents per newspaper, and $15 per dog. After purchasing the bike, how much money will Julie have left?
[Answer]Mowing lawns will earn Julie 20 * 20 = 400 dollars. Her earnings, in dollars, from delivering newspapers will be 600 * 40 / 100 = 240 dollars. After walking 24 of her neighbor’s dogs, she will earn 24 * 15 = 360 dollars. She will therefore earn a total of 400 + 240 + 360 = 1000 dollars. Combining earnings from her job with her savings will give Julie 1000 + 1500 = 2500 dollars. Subtracting the cost of the mountain bike from the total will leave Julie with a balance of 2500 - 2345 = 155 dollars. The answer is 155.
Q: Chip has a $50.00 balance on his credit card. Since he didn't pay it off, he will be charged a 20% interest fee. He puts $20.00 on his credit card the following month and doesn't make any payments to his debt. He is hit with another 20% interest fee. What's the current balance on his credit card?
A: He has a balance of $50.00 and is charged 20% interest so that's 50 * .20 = $10.00. He had a balance of $50.00 and now has a $10.00 interest fee making his balance 50 + 10 = $60.00. His balance is $60.00 and he puts another $20.00 on his card for a total of 60 + 20 = $80.00. He didn't make a payment that month and is hit with another 20% interest fee so that's 80 * .20 = $16.00 in interest. His new balance is 80 + 16 = $96.00. The answer is 96.
Question: There are 3 consecutive odd integers that have a sum of -147. What is the largest number?
Answer: Let N = smallest number. N + 2 = next number. N + 4 = largest number. N + (N + 2) + (N + 4) =  - 147. 3N + 6 =  - 147. 3N =  - 153. N =  - 51. The largest number is - 47. The answer is -47.
Q: A supermarket has 2355 loaves of bread at the start of the day. By afternoon, 629 loaves are sold, and a further 489 loaves are delivered to the supermarket by their supplier in the evening. How many loaves of bread are there at the end of the day?
A:
In the afternoon there are 2355 - 629 = 1726 loaves of bread left. By the evening there is a delivery and there are now 1726 + 489 = 2215 loaves of bread. The answer is 2215.