[Question]The post office receives 60 letters and 20 packages per day. How many pieces of mail does it handle in six months if all the months have 30 days?
[Answer]First find the total number of pieces of mail the post office receives per day: 60 letters + 20 packages = 80 pieces of mail. Then multiply the daily amount of mail by the number of days per month: 80 pieces / day * 30 days / month = 2400 pieces / month. Then multiply that number by 6 to find the total number of pieces of mail handled: 2400 pieces / month * 6 months = 14400 pieces. The answer is 14400.

[Question]Denmark wants to order pizza. For toppings, he has 3 cheese, 4 meat and 5 vegetable options, one of which is peppers. He can have only one selection from each topping category (one cheese, one meat and one vegetable). However, if he chooses to have pepperoni, he cannot have peppers. How many topping combinations does he have total?
[Answer]Permutate the ingredients. 3 cheeses * 4 meats * 5 vegetables = 60 choice. However, we must take out the combinations that could have pepperoni and peppers, 1 cheese + 1 meat * + 1 vegetable = 3 bad choices. 60 - 3 = 57 choices. The answer is 57.

[Question]Janet, a third grade teacher, is picking up the sack lunch order from a local deli for the field trip she is taking her class on. There are 35 children in her class, 5 volunteer chaperones, and herself. She she also ordered three additional sack lunches, just in case there was a problem. Each sack lunch costs $7. How much do all the lunches cost in total?
[Answer]Janet needs 35 lunches for the kids + 5 for the chaperones + 1 for herself + 3 extras = 44 lunches. Each lunch is $7, so lunch for the field trip costs $7 per lunch * 44 lunches = $308 total. The answer is 308.

[Question]In the jar, there are 7 blue marbles, 11 red marbles, and some yellow marbles. If the chance of randomly picking a yellow marble is 1/4, how many yellow marbles are there?
[Answer]
Let y be the number of yellow marbles. There are 11 + 7 + y = 18 + y total marbles. y / (18 + y) = 1 / 4. 4y = 18 + y. 3y = 18. y = 6. There are 6 yellow marbles. The answer is 6.