Mathematics
Sets and their representations
The Empty Set, Finite and Infinite Sets, Equal Sets
Practice questions
Which is the roster form of M = {x : x ∈ ℤ and −2 ≤ x < 3}?If N = {x : x is a triangle having four sides}, what kind of set is N?What is the roster form of P = {x : x ∈ ℕ and x is a divisor of 24}?Choose the roster form of R = {x : x = 3n, n ∈ ℕ, 2 ≤ n ≤ 6}.If T = {x : x is a two-digit number whose digits are equal}, what is the roster form of T?Which is the roster form of U = {x : x ∈ ℤ and x² − 5x + 6 = 0}?Using the conventional ordering in which Sunday is the first day of the week, which statement is correct about V = {x : x is the name of a day that comes before Monday}?If W = {x : x ∈ ℕ and x is a common divisor of 36 and 48}, what is W?What is the roster form of X = {x : x ∈ ℕ, x ≤ 10, and x is neither prime nor composite}?Which is the roster form of Y = {x : x is a distinct letter occurring in the word “level”}?If Z = {x : x ∈ ℕ and 2x + 1 < 12}, what is the roster form of Z?Which is the roster form of A₁ = {x : x ∈ ℤ and |x| < 3}?Which is the correct set-builder form of B₁ = {3, 6, 9, 12, …}?If C₁ = {x : x is a positive even composite number less than 15}, what is C₁?What is the roster form of D₁ = {x : x ∈ ℕ, the tens digit of x is 2, and x < 30}?If E₁ = {x : x ∈ ℕ, x² ≤ 100, and x is odd}, which is E₁ in roster form?Which is the correct roster form of G₁ = {x : x ∈ ℕ, x is a multiple of 18, and x < 100}?If H₁ = {x : x ∈ ℤ and x³ = x}, what is the roster form of H₁?Choose the roster form of I₁ = {x : x is a perfect square number from 1 through 50}.If J₁ = {x : x ∈ ℕ and x has exactly one positive divisor}, what is J₁?