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### Grade 8 - Mathematics4.28 Roster Form - I

 Set: A set is a collection of well defined objects. We write sets either in the Roster form or in the set builder form. Roster Form: This method is also known as tabular method. In this method, a set is represented by listing all the elements of the set, the elements being separated by commas and are enclosed within flower brackets { }. Example: A is a set of natural numbers which are less than 6. Solution: A = {1,2,3,4,5} is the Roster form. Directions: Write the given sets in Roster form. Also write at least ten examples of your own.
 Q 1: The set of odd natural numbers which are less than 6.{1,2,3,4,5}{1,2,3,5}{1,3,5} Q 2: A is a set of natural numbers.A = {.....-3,-2,-1,0,1,2,3,.....}A = {0,1,2,3,4,5,.....}A = {1,2,3,4,5,........} Q 3: D is a set of all days in a week.D = {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Satruday}D = {Sunday, Monday, Tuesday,, Wednesday, Thursday, Satruday}D = {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday} Q 4: Q is a set of whole numbers.Q = {.....-3,-2,-1,0,1,2,3,.....}Q = {1,2,3,4,5,........}Q = {0,1,2,3,4,5,.....} Q 5: B is a set of Integers.B = {1,2,3,4,5,........}B = {.....-3,-2,-1,0,1,2,3,.....}B = {0,1,2,3,4,5,.....} Q 6: B is a set of all months in a year having 30 days.B = {February, April, June, September, November}B = {January, April, June, September, November}B = {April, June, September, November} Question 7: This question is available to subscribers only! Question 8: This question is available to subscribers only!