Sets: members, "and", "or", "not", and set-builder and interval notation

Answer Key - Grade 9 Math Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   Ari draws the set ｛x | x > 3｝ on paper. Which number is a member of the set?

   • 0
   • 1
   • 3
   • 5
2. 2.

   Bo draws the set ｛x | x < 6｝ with a pencil. Which number is a member of the set?

   • 4
   • 9
   • 8
   • 6
3. 3.

   Esme draws the set ｛x | x ≥ 7｝ in a math notebook. Which number is a member of the set?

   • 5
   • 3
   • 6
   • 9
4. 4.

   Jun draws the set ｛x | x ≤ 4｝ on paper. Which number is a member of the set?

   • 9
   • 7
   • 2
   • 6
5. 5.

   Kira marks set A in red and set B in blue on one number line on paper. Which numbers are in A and in B?

   • ｛1, 2, 4, 7｝
   • ｛1, 3, 4, 6, 8｝
   • ｛3, 6, 8｝
   • ｛1, 2, 3, 4, 6, 7, 8｝
6. 6.

   Milo marks set A in red and set B in blue on one number line on paper. Which numbers are in A and in B?

   • ｛0, 2, 3, 4, 5, 9｝
   • ｛2, 3, 9｝
   • ｛0, 2, 3, 5, 9｝
   • ｛0, 4, 5｝
7. 7.

   Noah marks set A in red and set B in blue on one number line with a pencil. Which numbers are in A and in B?

   • ｛1, 2, 5, 6, 8, 9｝
   • ｛1, 5, 8, 9｝
   • ｛1, 2, 6, 8｝
   • ｛2, 6｝
8. 8.

   Pia reads the set ｛x | x is a whole number, 2 < x < 9｝ on paper. How many members does the set have?

   6
9. 9.

   Ren reads the set ｛x | x is a whole number, 4 < x < 10｝ with a pencil. How many members does the set have?

   5
10. 10.

    Tala reads the set ｛x | x is a whole number, 3 ≤ x ≤ 8｝ in a math notebook. How many members does the set have?

    6