Question

Which of the following pairs of sets are equal ?
P = {1, 4, 9} Q = {x : x = n^2, n ∈ N, n ≤ 3)
X = {x : x ∈ W, x < 5} Y = {x : x ∈ N, x ≤ 5}
M = {a, b, c, d} N = {p, q, r, s}
D = {x : x is a multiple of 30} E = {x : x is a factor of 10}​

Answer 1

1 option are equal sets and last three are not equal sets