Q1 of 162 Page 2

Describe the following sets in Roster form:

{x N: x is a prime number, 10 < x < 20}

X is a natural number and is between 10 and 20.


X is such that x is a prime number between 10 and 20.


Prime numbers between 10 and 20 are 11,13,17,19.


∴ Roster form will be {11,13,17,19}.


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