Representing an unknown or variable

12 questions

1. The value halfway between 13 and 27 is ___
2. Complete the calculation: 20+40\times 4 = ___
3. Select any values which are integers.
4. True or false: 52y is an equation for the number of weeks in a given number of years.
5. Sofia is thinking of a number. When she adds 6 then multiplies her number by 4 she gets 40. Which is an equation representing Sofia's number?
6. Which of the expressions below represent the algebra tiles in this diagram?
7. A letter can be used to represent ___, (quantities with set values) or variables (quantities that can take on a range of values).
8. Andeep says: I sleep 8 hours a night, I can write the number of hours I sleep for any number of nights as 8n. which of the following are true?
9. True or false: 3n is always bigger than n
10. To cook a lamb ‘well done’ the recipe says the length of time (mins) is 50 × mass (kg) + 20. What is the variable in this scenario?
11. For the statement x+y=44. What value can x have if it is 10 times bigger than y?
12. Match the expression with its relationship to the size of x

License: OGL