Four friends— Alexi, Kala, Lisa, and Jamal—are sitting at a round table. The person wearing the red shut', who is not Alexi or Kala, is sitting between Lisa and the person wearing the blue shirt'. The person wearing the green shirt is sitting between Kala and the person wearing the yellow shirt". What colour shirt is each person wearing?

stimate the total number of CDs owned by high school students in your province. Explain and justify your answer.

Each letter in the box represents a different number. The sums of four columns and four rows are given. Find the missing sums.

If Canada’s current national debt were divided equally among all Canadians, what would be each person’s share?

Suppose you start to write the whole numbers in words, starting at one. Remember that 101 is written “one hundred one.” In what number will

a) the letter “a” appear for the first time?

b) the letter “b” appear for the first time?

The numbers 1 to 6 are arranged so that the difference between a pair of numbers appears between and below the pair' of numbers. Use the same pattern to make a triangle with the numbers from 1 to 10. The 5 and the 7 have been placed for you.

About what percent of the land area in your city or town is covered by buildings?