A man has Rs. 640 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 ?  Choose the correct choice from the following answers.
A) 33 B) 38 C) 37 D) 120 E) 28
Let number of notes of each denomination be x.   Then x + 5x + 10x = 640   ⇒ 16x = 640   ∴ x = 40.   Hence, total number of notes = 3x = 120   Answer:120
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A man has Rs. 640 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 ?