Problems of the Week - December 27 to January 2

Rewards for Problems of the week:

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

 Lower Elementary:

 Question: Allison brings a box of 24 gumdrops to school one morning. She ate half of the gumdrops at lunch. At afternoon recess, she ate half of the gumdrops she had left. How many gumdrops does Allison have left after recess?

Upper Elementary:

Question: There are 10 knitters in a knitting club. Each knitter makes 18 hats per month. The knitting club takes all the hats and packs them in boxes of 12. How many boxes of hats can the knitting club fill in a month?

Middle School:

Question: Mason uses a promo code to get 20% off a video game console, plus free shipping! If the cost of the video game console is $450 and sales tax is 10% where Mason lives, then what is the final cost of the video game console?

Algebra and Up:

Question: What is the sum of all whole numbers from 1 to 100?

Challenge problem to take home. 5 stars for the correct answer. 

Which of these expressions is larger?

100! × 100!    or    99! × 101!