GRADE 5 MATHEMATICS

(b) E = {4, 6, 8,10} This set has four members or elements.

REMEMBER

► A set is usually denoted using a capital letter. ►A pair of curly brackets or braces { } is used when defining a set. ►The curly brackets { } means ‘the set of’ ►A set may be defined by describing it or by

Study these other examples: Examples

2. List the members of the set of C = {2,4,6} This set has three members, 2, 4 and 6. composite

3. List the even number which is prime.

E = {2} This set has one numeral, 2.

4. List the odd number which is even.

O = {} This set is empty. It has no members. listing the members. numbers from 1 to 8

Exercise List the members of the following sets. 1. O = {odd numbers between 23 and 30} 2. F = {the factors of 8} 3. C = {composite numbers less than 10} 4. T = { triangles with four sides} 5. R = {Roman numerals for 5,6,8,9,10} 6. H = {Hindu Arabic numerals for xiv, xx, xxii, xix} 7. P = {the set of even prime numbers greater than 2}

Describe the following sets in words.

8. G = {2,4,6, 8,10} 9. C = {1, 2, 3, 4, 5} 10. J = {5, 10, 15} 11. K = {1, 2, 3, 6, 9, 18} 12. N = {0, 1, 2, 3, 4} 13. P = {3,6, 9,12,15,18} 14. R = { i, ii, iii, iv, v} 15. M = {}

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