Question

In the month of March 2019, find the days on which the date is a multiple of 5. (see the given page of the calendar).

MARCH - 2019
M	T	W	T	F	S	S
				1	2	3
4	5	6	7	8	9	10
11	12	13	14	15	16	17
18	19	20	21	22	23	24
25	26	27	28	29	30	31

Answer 1

Dates which are multiple of 5:

5, 10, 15, 20, 25, 30

∴ S = {Tuesday, Sunday, Friday, Wednesday, Monday, Saturday}

∴ n(S) = 6

∴ The days on which the date will be a multiple of 5 are Tuesday, Sunday, Friday, Wednesday, Monday and Saturday.