Q3 of 86 Page 4

Write the following sets in roster form:

A = {x : x is an integer and –3 < x < 7}

Integers are …..-5, -4, -3,-2,-1 0,1, 2, 3, 4, 5, 6, 7, 8, 9, …………….


The elements of this set are -2,-1 0, 1, 2, 3, 4, 5 and 6


The roaster form is


A = {-2,-1 0,1, 2, 3, 4, 5, 6}


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1

Which of the following are sets? Justify your answer.

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Let A = {1, 2, 3, 4, 5, 6}. Insert the appropriate symbol â or ∉ in the blank spaces:

(i) 5. . .A


(ii) 8 . . . A


(iii) 0. . .A


(iv) 4. . . A


(v) 2. . .A


(vi) 10. . .A

 3

Write the following sets in roster form:

B = {x : x is a natural number less than 6}

 3

Write the following sets in roster form:

C = {x : x is a two-digit natural number such that the sum of its digits is 8}