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WORKBOOK

Example 19: A= {5, 10, 15, 20, ….,95, 100} is given. Find n(A).

*NOTE: If the difference of two consecutive terms is constant then the number of terms in the given

sequence is ……………………………………..

Example 20: Let A = {1, 2, 3, 4, 5, …, 90}. How many elements of set A are divisible by 4?

Example 21: A   :x 32  x  100 x ,  Z  is given. How many elements of A are divisible by 4?

Example 22: Let A = {1, 2, 3, 4, 5, …, 100}. How many elements of set A are divisible by

a) 4 and 6?

b) 4 or 6?

c) 4 and 8?

24 091math-wb-w3-(sets)