Câu 1: How many distinct 3 - digit odd numbers can you make by using 0;1;2;4 and 5 ? (Giải thích rõ giúp mình)

 Câu 2: How many distinct 4 - digit numbers are divisible by 2 can be form from digits 0;2;5;6 and 9 ? (Giải thích rõ luôn nha)

choose 3 digits from 1, 3, 4, 5, 9 to form 3-digit numbers. how many number(s) that can be divisible by 5 is / are there?

choose 3 digits from 1, 3, 4, 5, 9 to form 3-digit numbers. how many number(s) that can be divisible by 5 is / are there? 

given the digits from 0 to 5 if repetition is not allowed, how many four-digit codes that are greater than 2000 and divisible by 2 are possible? Answer:...

Câu 6:
How many distinct 3-digit numbers can you make by using 1, 2, 0, 4 and 5?
Answer:  numbers.

how many 3- distinct digit numbers can you make from 0, 2, 5, 6 and  8

Question 9:
If we write all of the whole numbers from 10 through 99 and cross out any number in which the first or second digit is divisible by 2 (for example, 41 is crossed out as 4 is divisible by 2 and 36 is crossed out as 6 is divisible by 2), how many numbers are crossed out?
Answer:  numbers.

How many distinct 3-digit numbers can you make by using 1, 2, 0, 4 and 5?

How many distinct 3-digit numbers can you make by using 1, 2, 0, 4 and 5?
Answer:  numbers.