A man has Rs. 480 in the denominations of one-rupee notes, five-rupee notes and ten-rupee notes. The number of notes of each denomination is equal. What is the total number of notes that he has ?

Let number of notes of each denomination be x.

Then, x + 5x + 10x = 480  16x = 480   x = 30.

Hence, total number of notes = 3x = 90.