1) What is a set? a) A collection of objects b) A single object c) A mathematical operation d) A type of number 2) What symbol represents a set? a) @ b) { } c) # d) $ 3) What does '∩' represent in set notation? a) Union b) Intersection c) Difference d) Subset 4) What does '∪' represent in set notation? a) Intersection b) Union c) Complement d) Subset 5) What is a Venn diagram? a) A type of graph b) A diagram showing sets c) A number line d) A pie chart 6) What does the shaded area in a Venn diagram represent? a) The union of sets b) The intersection of sets c) The difference of sets d) The complement of sets 7) How many sets can a Venn diagram with three circles represent? a) 1 b) 3 c) 7 d) 8 8) What is the complement of a set? a) Elements not in the set b) Elements in the set c) The union of sets d) The intersection of sets 9) If A = {1, 2, 3} and B = {3, 4, 5}, what is A ∩ B? a) {1, 2} b) {3} c) {4, 5} d) {1, 2, 3} 10) If A = {1, 2, 3} and B = {3, 4, 5}, what is A ∪ B? a) {1, 2, 3, 4, 5} b) {3} c) {1, 2} d) {4, 5} 11) What is the universal set? a) All possible elements b) A single element c) A subset d) An empty set 12) What does an empty set contain? a) No elements b) One element c) All elements d) Two elements 13) What is the symbol for an empty set? a) Ø b) U c) I d) C 14) If A = {1, 2, 3}, what is the power set of A? a) {Ø, {1}, {2}, {3}, {1, 2}, {1, 3}, {2, 3}, {1, 2, 3}} b) {1, 2, 3} c) {Ø} d) {1, 2} 15) What is a subset? a) A set within a set b) A larger set c) An empty set d) A universal set 16) If A = {1, 2} and B = {1, 2, 3}, is A a subset of B? a) Yes b) No c) Sometimes d) Never 17) What does 'A ⊆ B' mean? a) A is a subset of B b) A is not a subset of B c) A is equal to B d) A is a superset of B 18) If A = {1, 2, 3} and B = {4, 5, 6}, what is A ∩ B? a) Ø b) {1, 2, 3} c) {4, 5, 6} d) {1, 4} 19) If A = {1, 2, 3} and B = {2, 3, 4}, what is A - B? a) {1} b) {2, 3} c) {4} d) {1, 4} 20) What is the symbol for the union of sets? a) ∪ b) ∩ c) - d) ⊆

Introduction to sets and Venn diagrams Grade 9

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