Q3 of 145 Page 4

Write the following sets in roster from:

C = {x : x is a two-digit number such that the sum of its digits is 9}.



The elements of this set are 18, 27, 36, 45, 54, 63, 72, 81 and 90


So, C = {18, 27, 36, 45, 54, 63, 72, 81, 90}


More from this chapter

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3

Write the following sets in roster from:

A = {x : x is a natural number, 30 ≤ x < 36}.


 3

Write the following sets in roster from:

B = {x : x is an integer and –4 < x < 6}.


 3

Write the following sets in roster from:

D = {x : x is an integer, x2 ≤ 9}.


 3

Write the following sets in roster from:

E = {x : x is a prime number, which is a divisor of 42}.