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Question
Write the following set in roster form:
C = {x : x is a two-digit natural number such that the sum of its digits is 8}
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Solution
C = {x : x is a two-digit natural number such that the sum of its digits is 8}
The elements of this set are 17, 26, 35, 44, 53, 62, 71, and 80 only.
Therefore, the given set can be written in roster form as C = {17, 26, 35, 44, 53, 62, 71, 80}.
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