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# Math Problems of the Week - Oct. 9, 2022 to Oct. 15, 2022

Oct 9, 2022 | Location West Covina

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?

Solution: There are 12 inches in a foot. So, 2 feet is 12 + 12 = 24 inches. The grub is 20 inches underground, and since 20 is less than 24 inches, the fennec fox can hear it.

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?

Solution: The wheel spider turns itself into an octagon whose sides are 1/4 of an inch. An octagon has 8 sides, so the perimeter of the wheel spider is effectively 1/4 × 8 = 2 inches. There are 12 inches in a foot and 3 feet in a yard, so there are 12 × 3 = 36 inches in a yard. To roll 36 inches, the spider has to roll over 36 ÷ 2 = 18 times.

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.