Rose Harrison and Clara Huizink Solutions for Exercise 3: Practice 1

List the elements of these sets, and find the number of elements in each set.

C is the set of factors of 12.

List the elements of these sets, and find the number of elements in each set.

D is the set of positive integers less than $30$ that are multiples of $4$.

Describe each set in words.

L = {right angle, obtuse, acute, reflex}

Given the sets A = {$4, 6, 8, 10$}, B = {$1, 8, 27, 64$}, C = {$1, 3, 4, 7, 11$} and D = {$0, \pm 1, \pm 2, \pm 3, \pm 4$}, state whether the given statement is true or false. If the statement is false, write the correct statement.

$4\in$A

Given the sets A = {$4, 6, 8, 10$}, B = {$1, 8, 27, 64$}, C = {$1, 3, 4, 7, 11$} and D = {$0,\pm 1, \pm 2, \pm 3, \pm 4$}, state whether the given statement is true or false. If the statement is false, write the correct statement.

$7\notin C$

Given the sets A $= \{4, 6, 8, 10\},$ B $= \{1, 8, 27, 64\}$, C $= \{1, 3, 4, 7, 11\}$ and D $= \{0, \pm 1, \pm 2, \pm 3, \pm 4\}$, state whether given statement is true or false. If the statement is false write the correct statement.

$27\in A$

Given the sets A $= \{4, 6, 8, 10\},$ B $= \{1, 8, 27, 64\}$, C $= \{1, 3, 4, 7, 11\}$ and D $= \{0, \pm 1, \pm 2, \pm 3, \pm 4\}$, state whether the given statement is true or false. If the statement is false write the correct statement.

$8\in D$

Given the sets A $= \{4, 6, 8, 10\},$ B $= \{1, 8, 27, 64\}$, C $= \{1, 3, 4, 7, 11\}$ and D $= \{0, \pm 1, \pm 2, \pm 3, \pm 4\}$, state whether the given statement is true or false. If the statement is false write the correct statement.

$n\left(C\right)= n\left(D\right)$