Question

a purse contains rupees 550 notes of denominations of rupee 10 and rupee 50 if the number of rupees 50 notes is 1 less than that of rupees 10 notes then find the number of rupees 50 notes

Answer 1

A pair of 1 rupee and 50 rupee notes give us 60 rupees. 9 such pairs give us 540 rupees. Add the 1 more Rs.10 now. There are 9 notes of Rs.5 in that way.