Problems of the Week - August 16 to August 22

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: Fennec foxes have huge ears and can hear a grub up to 2 feet underground. Can a fennec fox hear a grub that is 20 inches underground?

Upper Elementary: 

Question: A golden wheel spider tucks its legs in and turns its body into an octagonal wheel in order to travel across the sand. Its legs hit the ground a quarter inch apart. How many times does the spider have to roll over in order to roll a whole yard?

Middle School: 

Question: A camel can go six months without drinking water. It can also drink water very quickly—30 gallons in 13 minutes! Find the rate at which a camel drinks in gallons per hour.

 Algebra and Up:

Question: A barrel cactus, a hedgehog cactus, and a saguaro cactus have 1,392 spines altogether.  The hedgehog cactus has 144 more spines than the barrel cactus, and the saguaro cactus has 888 more spines than the barrel cactus. How many spines does each cactus have?

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

Every letter corresponds to a different digit and $$0 cannot be the first digit of a number. What is the sum $$C+A+R?