Problems of the Week - January 31 to February 6

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: A shark eats 10 fish on Monday, 9 fish on Tuesday, 8 fish on Wednesday, and so on. If the pattern continues, how many fish does the shark eat over the course of 1 whole week?

Upper Elementary:

Question: A giant pacific octopus weighs 110 pounds. A blue-ringed octopus weighs 4 ounces. How many blue-ringed octopuses weigh the same amount as a giant pacific octopus?

Middle School:

Question: An anemone catches 10 pounds of food over the course of a week and consumes 62.5% of it. A school of clownfish that lives with the anemones eat ³/₈ of the anemone’s uneaten prey. What percentage of the anemone’s food goes uneaten?

Algebra and Up:

Question: Some species of pufferfish draw circles in the sandy seafloor to communicate. If a pufferfish draws a circle whose diameter is 12 times the length of the fish’s body, then how many times the length of the fish is the circumference of the circle?

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

Meredith has won the lottery!

She spends 4/5 of the money on a large house.

She spends 3/4 of the remaining money on a luxury yacht.

She spends 2/3 of the remaining money on a trip to space.

Finally, she gives the remaining $50,000 to charity.

How much money did she win?