Textbook Questions 14, 15, and 17

14. Alex is thinking of a number. The number has a square root between 7 and 8, and a multiple of 12.

a) What number could he be thinking of?

b) Is there more than one answer? Explain.

No, because 60 is the only number that is between the square root of 7 and 8 that is a multiple of 12.

15. Order the following numbers from least to greatest:

Ordered from least to greatest:

17. Carmel wants to mount an 18cm x 18cm square picture on a square board that is four times the area or the picture

a) What is the area of the picture?

324cm(squared)

b) What is the area of the board?

I got this answer because I multiplied 324cm(squared) by 4.

c) What are the dimensions of the board?

Play Mangahigh

Here's a video that can help.