Question

A child puts one five-rupee coin of her saving in the piggy bank on the first day. She increases her saving by one five-rupee coin daily. If the piggy bank can hold 190 coins of five rupees in all, find the number of days she can continue to put the five-rupee coins into it and find the total money she saved.

Answer 1

1 day => 1 coin

190 days => 190 coins (full)

so it takes 190-1=189 more days to fill it

total money saved = 190x5=950 rupees