A man has Rs. 480 in one-rupee, five-rupee, and ten-rupee notes, with an equal number of each. Find the total number of notes.

Given data

• Total amount = Rs. 480
• Three denominations: Rs. 1, Rs. 5, Rs. 10
• Counts equal ⇒ let each count be x.

Concept / Approach

• Total value = 1·x + 5·x + 10·x = 16x.

Step-by-step calculation

16x = 480 ⇒ x = 480 ÷ 16 = 30Total number of notes = 3x = 90

Verification

Value check: 30×1 + 30×5 + 30×10 = 30 + 150 + 300 = 480.

Common pitfalls

• Taking 480 ÷ 3 to get x (ignores denomination values).

Final Answer

Total notes = 90.