Question

How many integers between 0 and 500:

1. Have distinct digits?

2. Are divisible by 3?

3. Are divisible by 3 or 5?

4. Are divisible by either 3 or 5, but not both?

5. Are divisible by 3, but not 5?


Pls help asap!!

Answer 1

378

Explanation:

1 digit numbers - 9

2 digit numbers - 90

Now, subtract the repeating numbers 90-9 = 81

3 digit numbers = 4*9*8 = 288

Distinct numbers = 9+81+288 = 378 numbers

Answer 2

4

Explanation:

they are divisible by either 3 or 5 but not both of these numbers