Problems of the Week - June 28 to July 4

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: Match the measurements on the left with the appropriate units of measure on the right:

Upper Elementary: 

Question: Sammy is wrapping a birthday gift and wants to find out how much ribbon he’ll need. He wants to wrap the ribbon all the way around the gift box twice, then have an extra 1¹/₂ feet of ribbon for the bow on top. If the gift box is a cube that is 15 inches wide, how many inches of ribbon will he need?

Middle School: 

Question: Ashley is playing a game on her smartphone that measures the distance she walks. Every 2 kilometers, the game gives her a prize. Ashley starts the game and then walks 5 miles. How many prizes does she earn?

(Hint: There are 1.609 kilometers in 1 mile.)

 Algebra and Up:

Question: It takes Alice 45 minutes to complete a jigsaw puzzle. It takes Keisha an hour to complete a jigsaw puzzle of the same size. If they work together on the same jig­saw puzzle, how long will it take them to complete it?

Challenge problem to take home. 10 stars for the correct answer. 

How many positive integers ≤ 100 are not divisible by 3 or 11?