Problems of the Week - April 12 to April 17

Rewards for Problems of the week:

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

Lower Elementary: 

Question: Oscar sketched twice as many portraits as Polly. Polly sketched twice as many portraits as Kate. Kate sketched 4 portraits. How many portraits did Oscar sketch?        

 Upper Elementary:

Question: Carlo had four 16–pound tubs of clay. After he sculpted a 36–pound bust, how many tubs of clay did he have left?

 Middle School:

Question: Tyler shot 7 rolls of film. On each of the first 3 rolls, 16 photos turned out. Fourteen photos turned out on each of the next 4 rolls. If Tyler shoots 1 more roll of film, how many photos need to turn out for Tyler to have an average of 17 successful photos per roll?

Algebra and Up: 

Question: Mia has two cans of purple paint and a can of white paint. One of the purples is 30% red and 70% blue. The other is 50% red and 50% blue. If Mia wants 8 fluid ounces of a mixture that is 20% red, 30% blue, and 50% white, how many fluid ounces of each kind of paint does she need?

Challenge problem to take home. 20 points for the correct answer. 

In this circle puzzle, dashed arrows indicate addition while solid arrows indicate multiplication. Which number will replace the question mark?