## BASIC MATHEMATICS

Question 1 The universal set is {natural numbers from 1 to 20 inclusive} (a) List the elements of each of the following subsets: A = {even numbers} B = {multiples of 5} C = {prime numbers} D = {factors of 20} E = {numbers less than 5} (b) Use (a) and answer the following questions: B E A C A B n(D) = ???. B ~ ???? [10] Question 2 Make use of a Venn diagram to solve the following problem. There are 210 learners with different home languages in a school: 110 speak Oshivambo 90 speak Otjiherero 50 speak Silozi 10 speak Oshivambo and Otjiherero 30 speak Otjiherero and Silozi 5 speak Oshivambo and Silozi Only 3 speak all three languages