Question

Using only 2, 5, 10, 25, and 50 paisa coins, what will be the minimum number of coins required to pay exactly 78 paise, 69 paise and Rs. 1.01 to three different persons?

• A. 19
• B. 20
• C. 22
• D. 18

Hint:

When using coins, start with the highest denomination to minimize the number of coins needed.

Answer 1

The Correct Option is B

We use the minimum number of coins for each person: - For 78 paise: Use 1 x 50 paisa, 1 x 25 paisa, 1 x 2 paisa, and 1 x 1 paisa coin (4 coins).
- For 69 paise: Use 1 x 50 paisa, 1 x 10 paisa, 1 x 5 paisa, and 1 x 2 paisa (4 coins).
- For Rs. 1.01: Use 1 x 50 paisa, 1 x 25 paisa, 1 x 10 paisa, and 1 x 1 paisa (4 coins).
Thus, the total minimum number of coins required is 20.