Question

how many 3-digit numbers can you from using the digit 5,6 and 9​

Answer 1

I will start from the lowest to the highest value to make it easier:

1 - 569

2 - 596

3 - 659

4 - 695

5 - 956

6 - 965

Hence, we can make 6 3-digit numbers from the digits 5,6 and 9.