Question

Write each of the following sets in Roster (tabular) Form and also in Set-Builder Form.

(i) Set of all natural numbers that can divide 24 completely.

(ii) Set of odd numbers between 20 and 35.

(iii) Set of letters used in the word ‘CALCUTTA’.

(iv) Set of names of the first five months of a year.

(v) Set of all two digit numbers that are perfect square as well.

Answer 1

(i) {1,-2, 3, 4, 6, 8, 12, 24}; {x : x is a natural number which divides 24 completely}

(ii) {21, 23, 25, 27, 29, 31, 33}; {x:x is an odd number between 20 and 35}

(iii) {c, a, l, u, t}; {x: x is a letter used in the word ‘CALCUTTA’}

(iv) {January, February, March,April, May}; {x : x is name of first five months of a year}

(v) {16, 25, 36, 49, 64, 81}; {x : x is a perfect square two digit number}.