# 1.09 Language and notation of sets

## Interactive practice questions

A coin is flipped. What outcomes could happen?

Black

A

B

Tails

C

Red

D

Black

A

B

Tails

C

Red

D
Easy
Less than a minute

If I draw a marble out of the jar without looking, what are all the possible colours the marble might be? Select all the correct answers.

If I pick a whole number between (and including) $3$3 and $7$7, what are all the possible numbers I may have picked?

List your answers on the same line, with a comma between each of them.

Consider the sets $A=\left\{3,6,9,12,15,18\right\}$A={3,6,9,12,15,18}, $B=\left\{3,9,12,18\right\}$B={3,9,12,18}, $C=\left\{9,18\right\}$C={9,18} and $D=\left\{3,6,9,12,15,18,21\right\}$D={3,6,9,12,15,18,21}.

Determine whether each statement is true or false.

### Outcomes

#### 9.B1.2

Describe how various subsets of a number system are defined, and describe similarities and differences between these subsets.