[Question]: For the funfair, the school organizers ordered 30 rolls of tickets. Each roll of tickets has 100 tickets. The 4th graders bought 30% of the tickets while the 5th graders bought 50% of the remaining tickets. Then the 6th graders bought a total of 100 tickets. How many tickets were left unsold?
[Answer]: There were a total of 30 x 100 = 3000 tickets ordered by the school organizers. The 4th graders bought 3000 x 30 / 100 = 900 tickets. So, there were 3000 - 900 = 2100 tickets left for the other two grade levels. The 5th graders bought 2100 x 50 / 100 = 1050 tickets. So, 2100 - 1050 = 1050 tickets were left then. Since 100 tickets were bought by the 6th graders, therefore 1050 - 100 = 950 tickets were left unsold.
So the answer is 950.

[Question]: To get free delivery, Alice needs to spend a minimum of $35.00 online at her favorite grocery store. In her cart she has 1.5 pounds of chicken at $6.00 per pound, 1 pack of lettuce for $3.00, cherry tomatoes for $2.50, 4 sweet potatoes at $0.75 each, 2 heads of broccoli for $2.00 each and a pound of Brussel sprouts for $2.50. How much more does she need to spend in order to get free delivery?
[Answer]: She bought 1.5 pounds of chicken for $6.00 / pound so that's 1.5 * $6 = $9.00. She bought 4 sweet potatoes at $0.75 each so that's 4 * $0.75 = $3.00. She bought 2 heads of broccoli for $2.00 each so that's 2 * $2 = $4.00. The chicken is $9.00, lettuce is $3.00, tomatoes are $2.50, the sweet potatoes are $3.00, broccoli is $4.00 and Brussel sprouts are $2.50 for a total of $9 + $3 + $2.50 + $3 + $4 + $2.5 = $24.00. To get free delivery she needs to spend $35.00, and she already has $24.00 in her cart, so she needs to spend an extra $35 - $24 = $11.00.
So the answer is 11.

[Question]: Two apartment roommates split the rent, utilities, and grocery payments equally each month. The rent for the whole apartment is $1100 and utilities are $114. If one roommate pays $757 in all, how many dollars are groceries for the whole apartment?
[Answer]:
Rent plus utilities for the whole apartment is 1100 + 114 = $1214. If one roommate pays $757 in all, the total cost of everything is 757 * 2 = 1514. The groceries cost 1514 - 1214 = 300.
So the answer is 300.