Sets - Grade 9

What is a set?

• A collection of elements with nothing in common.

• A group of things with something in common.

• An integration of fruits that are red.

Which symbol means is an element of?

• $\in$

• $\notin$

• $\not\subset$

• $\subset$

What does the symbol in the picture mean?

• Is an element of

• Is a member of

• The set of

• The universal set

If A = {Odd numbers less than 10}, which statement is TRUE?

•  $3\in A$  

•  $2\in A$  

Which symbol completes the statement?

 Banana ____ F.

•  $\notin$  

•  $\subset$  

•  $\in$  

If B = {Tuesday, Thursday}. Which statement is the BEST description of set B?

• {Days of the week}

• {Days}

• {Days of the week beginning with the letter T}

• {Days of the week between Tuesday and Thursday}

If R = {Vowels of the alphabet}, the elements of set R are:

• {a, b, c, d, e}

• {a, i, o, u, v}

• {a, e, i, o, u}

• {a, e, d, g, h}

A set that has no elements is called a/an:

• finite set

• infinite set

• empty set

The symbol  $\cup$  means:

• Intersection

• Empty set

• Universal set

• Union

If A = {1, 2, 3, 4, 5} and B = {2, 4, 6, 8}, the set {2, 4} represents:

• $A\cup B$

• $A\cap B$

• $A\subset B$