Mathematics
The Empty Set, Finite and Infinite Sets, Equal Sets
Practice questions
If A = {x : x ∈ Z, x² < 4}, which set is A?If A = {x : x ∈ N, x is a two-digit even number less than 100}, what kind of set is A?What kind of set is A = {x : x ∈ N, x is greater than 7 and less than 7}?If A = {x : x ∈ ℕ, x is a square root of 36}, what is A?If A is the set of all real numbers greater than 3, what type of set is A?Which set is equal to {2, 4, 8, 16}?If A = {x : x ∈ ℤ, x² = 2}, what kind of set is A?If A = {x : x ∈ ℕ, x is a factor of 15} and B = {1, 3, 5, 15, 15}, which statement is correct?How many elements are in A = {x : x ∈ ℕ, x is odd and x ≤ 11}?If A = {x : x ∈ ℕ, x is a prime number greater than 20}, what kind of set is A?Which option correctly shows A = {x : x ∈ ℤ, −1 ≤ x ≤ 3} in roster form?If A = {x : x ∈ ℕ, x is a multiple of 9 and x < 50}, how many elements are in A?If A = {x : x ∈ ℕ, x is a factor of 14 and x is odd}, what is A?If A = {x : x ∈ N, x is a factor of 10} and B = {x : x ∈ N, x is a factor of 20 and x ≤ 10}, what is the correct statement?What type of set is A = {x : x ∈ N, x is divisible by both 13 and 17}?If A = {x : x ∈ Z and x² ≤ 9}, how many elements does A have?If A = {x : x ∈ N, x is an even factor of 21}, what kind of set is A?What type of set is A = {x : x ∈ N, x is a power of 2}?Which option correctly describes the difference between an empty set and a singleton set?Let A = {x : x ∈ N, x is a factor of 100, and x > 25}, where N = {1, 2, 3, ...}. How many elements does A have?