Question

Write the following sets in Descriptive form
(i) $A=\{a,e,i,o,u\}$
(ii) $B=\{1,3,5,7,9,11\}$
(iii) $C=\{1,4,9,16,25\}$
(iv) $P=$ { $x:x$ is a letter in the word 'set theory' }
(v) $Q=$ { $x:x$ is a prime number between 10 and 20 }

Answer 1

(i) $A$ is the set of all vowels in the English alphabet
(ii) $B$ is the set of all odd natural numbers less than or equal to 11
(iii) $C$ is the set of all square numbers less than 26.
(iv) $P$ is the set of all letters in the word 'set theory'
(v) $Q$ is the set of all prime numbers between 10 and 20