The timeline shows some dates in Canadian history. Use the clues and mental math to identify each date. Describe your strategy.

a) York becomes the capital of Upper Canada 126 years after the Hudson’s Bay Company is created.

b) Canada officially becomes a country 71 years after York becomes the capital of Upper Canada.

c) The Cree, Beaver, and Chipewyan First Nations and the Government of Canada sign a treaty 15 years before Canada enters the First World War.

A recycling company is hoping to collect over 400 000 plastic milk containers by December 31 to raise money for a food bank. About how many more containers need to be collected in December to reach the goal? Explain how you estimated.

In a magic square, the numbers in the columns, rows, and diagonals have the same sum. This magic square uses the whole numbers from 351 to 366. Complete the magic square.

a) What is the greatest sum of 4 different three-digit whole numbers? Explain your reasoning.

b) What is the least sum of 4 different three-digit whole numbers? Explain your reasoning.

Cornet Halley is a periodic comet that is visible at regular intervals. It was visible from Earth in 1758, 1834, 1910, and again in 1986. How many more times will it be visible before the year 2500?

A merchant has four masses of 0.25 kg, 0.75 kg, 2.25 kg, and 6.75 kg and balance scales.

a) What is the mass of the bag of wild rice? Show your work.

b) Determine at least 5 other masses the merchant can measure with his four masses and balance scales. Show your work.

Suppose you won a $50 gift certificate for a door plaque. The chart shows the cost including taxes of each type of door plaque.

a) How much would it cost for a door plaque for you and three of your friends?

b) What change would you receive?

Logan entered a whole number into his calculator. He subtracted a decimal number and his answer ended in .475. List three numbers that he might have entered.

Megan measured the mass of two bags of sesame seeds. What mass of seeds should she pour from the larger bag to the smaller bag so that both bags have the same mass? Explain your reasoning.

Bag 1 - 1.909 kg

Bag 2 - 0.799 kg

Conner stopped three times to take a drink before he completed a 10.000 km cross-country ski trail. His first stop was 3.998 km from the start. His third stop was 1.200 km from the finish. His second stop was halfway between his first and third stop. What is the distance from the start to his second stop? Show your work.