Mathematics
Sets and their representations
The Empty Set, Finite and Infinite Sets, Equal Sets
Practice questions
Which statement is correct for the set D = {x ∈ ℕ : x² = 16}?If E = {x ∈ ℕ : x is odd and x < 2}, what is E?What is the correct form of F = {x ∈ ℕ : 5 < x < 6}?Which is the correct set-builder form of the set G = {2, 4, 6, 8}?If H = {1, 2, 2, 3, 3, 3}, how many distinct elements are actually in the set H?How many elements are in the set J = {x ∈ ℤ : x² < 4}?If K = {x ∈ ℕ : x divides 12 exactly}, which is the roster form of K?Which is the correct roster form of L = {x : x is a two-digit prime number and x < 15}?If M = {x ∈ ℕ : x ≤ 50 and x is a multiple of 10}, how many elements are in M?Which statement is correct about the set N = {x ∈ ℕ : x + 3 = 3}, assuming ℕ = {1, 2, 3, ...}?What is the roster form of the set P = {x ∈ ℤ : x² = 9}?Which is the roster form of Q = {x ∈ ℕ : x² ≤ 25}?How many elements are in the set R = {∅}?If S = {x ∈ ℕ : x is a multiple of 7 and x < 30}, which is the correct roster form of S?Which is the roster form of T = {x ∈ ℕ : x is a perfect square and x < 50}?If V = {x ∈ ℤ : -2 ≤ x < 3}, what is n(V)?Which is the roster form of W = {x ∈ ℕ : x is a factor of 18 and x is even}?Which is the set X = {x ∈ ℕ : x is a multiple of both 4 and 6 and x < 30}?Which is the roster form of Z = {x ∈ ℤ : |x| < 3}?If A₁ = {x ∈ ℕ : 1 ≤ x ≤ 5}, which is the correct roster form of A₁?