ICSE Class 6 Mathematics - Sets - Test 4 (Expert)
1. If A = {1, 3, 5, 7, 9} and B = {2, 3, 5, 8}, what is A intersection B?
A. {1, 7, 9}
B. {3, 5}
C. {1, 2, 3, 5, 7, 8, 9}
2. If A = {1, 3, 5, 7, 9} and B = {2, 3, 5, 8}, what is A union B?
A. {3, 5}
B. {1, 3, 5, 7, 9}
C. {1, 2, 3, 5, 7, 8, 9}
3. If A = {1, 3, 5, 7, 9} and B = {2, 3, 5, 8}, what is A - B?
A. {1, 7, 9}
B. {2, 8}
C. {3, 5}
4. If U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} and A = {2, 4, 6, 8, 10}, which elements are not in A?
A. {2, 4, 6, 8, 10}
B. {1, 3, 5, 7, 9}
C. {1, 2, 3, 4, 5}
5. If A = {a, b, c, d} and B = {c, d, e, f, g}, how many elements are in A union B?
A. 5
B. 6
C. 7
6. If A = {a, b, c, d} and B = {c, d, e, f, g}, how many elements are in A intersection B?
A. 2
B. 4
C. 7
7. Which is not a subset of {0, 1, 2, 3}?
A. {0, 2}
B. {1, 4}
C. {1, 2, 3}
8. How many elements are in the set of letters of the word MISSISSIPPI?
A. 3
B. 5
C. 4
9. The set {2, 4, 6, 8, 10} can be described as:
A. Even natural numbers not exceeding 10
B. Odd natural numbers less than 10
C. Prime numbers less than 10
10. If two sets are disjoint, their intersection is:
A. Universal set
B. Empty set
C. Singleton set
11. Which collection is not well-defined?
A. Months of a year
B. Factors of 20
C. Tall boys in a school
12. Which of the following is a singleton set?
A. {0}
B. {}
C. {0, 1}
13. If A is the set of factors of 15 and B is the set of multiples of 5 less than 20, what is A intersection B?
A. {1, 3}
B. {5, 15}
C. {5, 10, 15}
14. If A is the set of factors of 10 and B is the set of factors of 14, what is A union B?
A. {1, 2}
B. {5, 7, 10, 14}
C. {1, 2, 5, 7, 10, 14}
15. Which is a proper subset of {north, south, east, west}?
A. {north, east}
B. {north, south, east, west}
C. {up, down}
16. What is the cardinal number of the set of prime numbers less than 15?
A. 5
B. 6
C. 7
17. If A = {1, 3, 6}, B = {3, 6, 9}, and C = {3, 6, 12}, what is common to all three sets?
A. {1, 9, 12}
B. {3}
C. {3, 6}
18. If A = {1, 2}, B = {2, 3, 4}, and C = {4, 5, 6}, what is A union B union C?
A. {1, 2, 3, 4, 5, 6}
B. {2, 4}
C. {1, 3, 5}
19. Which statement is correct about the empty set?
A. It has one element, 0
B. It is a subset of every set
C. It is always an infinite set
20. If A = {2, 4, 6, 8} and B = {4, 8}, what is A - B?
A. {4, 8}
B. {2, 4, 6, 8}
C. {2, 6}