2.1 Practice

Question 1

Set of natural numbers between 13 and 169

Answer 1

{14, 15, 16, 17, …, 168}

Question 2

Set of natural numbers between 1 and 10 inclusive

Answer 2

{1, 2, 3, …, 10}

Question 3

B = {x | x∈N and x > 20}

Answer 3

B = {1, 2, 3, … , 19}

Question 4

A = {3, 6, 9, 12, …}

Answer 4

A = {x | x∈N and x is a multiple of 3}

Question 5

True or false
2 ∈ {2, 4, 6, 8, …}

Answer 5

True because 2 is in the set