Here are the Problems of the Week from your favorite math learning centre in NW Calgary!  Students don't forget to have your solutions in to me by Sunday! 

Grade 1-3:

Question: Hailey spends 10 hours every month volunteering at an animal shelter. How many hours does Hailey spend volunteering in a whole year?

Grade 4-6:

Question: Machine A doubles a number. Machine B adds 2 to a number. Machine C subtracts 3 from a number. What will happen to the number 10 if we put it through all of the machines in alphabetical order?

Grade 7-9:

Question: Torvi is playing a game with a 20-sided die. What is the probability that she will roll a 20 on the die 3 times in a row?

Grade 10-12:

Question: Micah is trying to get the salt levels just right for his 20-litre aquarium. His local pet store sells salinated water by the litre in two different salinity levels—30 parts per thousand and 35 parts per thousand. How much of each does Micah need to pour into the tank to get the salt level in the tank to exactly 32 parts per thousand saltwater?