Problems of the Week - February 15 to February 20

Rewards for Problems of the week:

5 points for the correct answer at your level; 10 points for the next level; 20 points each for 2+ levels up.

Lower Elementary:

Question:  Kyle is paying for a dinner. The entire dinner came to $33.50. Kyle paid with a $25 gift card and a $20 bill. How much change will Kyle get back?

Upper Elementary:

Question:  Annie is cooking breakfast. She starts with a full carton of 18 eggs and fries two thirds of them, but she burns a quarter of the eggs she fries. How many eggs does Annie fry successfully?

Middle School:

Question: An order of bacon and an order of pancakes cost $11.00 altogether. An order of pancakes and a cold-pressed juice cost $10 altogether. A cold-pressed juice and an order of bacon cost $9 altogether. If all menu items cost whole-dollar amounts, how much does a double-order of pancakes cost?

Algebra and Up:

Question: Five people sit down for a fancy dinner. Each of their napkins is folded into a different origami animal—a swan, a frog, a rabbit, a fish, a pig, or a turtle. The person at the head of the table always gets the rabbit. How many different ways can the napkins be arranged around the table?

Challenge problem to take home. 20 points for the correct answer. 

How many four-digit numbers can we create by rearranging digits of 2021? All four of the digits must be used exactly once and 0 cannot be the first digit.