In the following six digits, f is a natural number that is not equal to 0 and less than 10, s is 0, and the number that must be divisible by 3 and 5 is () A. FFFSFFB. FSFSFSC. FSSFSS

In the following six digits, f is a natural number that is not equal to 0 and less than 10, s is 0, and the number that must be divisible by 3 and 5 is () A. FFFSFFB. FSFSFSC. FSSFSS

If s = 0, FSFS can be divided by 5, the sum of F + F + F must be a multiple of 3, FSFS can also be divided by 3

In the following six digits, f is a natural number that is not equal to 0 and less than 10, s is 0, and the number that must be divisible by 3 and 5 is ()
A. FFFSFFB. FSFSFSC. FSSFSS

If s = 0, FSFS can be divided by 5, the sum of F + F + F must be a multiple of 3, FSFS can also be divided by 3

If M is a natural number less than 10 and N is 0, then the following four six digits can be divided by 2, 3 and 5 at the same time
There are four answers: mnmmmn mnnmnm mnmmnn mmnmmn
Which one?

MNMMNN
The last digit of this six digit is 0, so it can be divided by 2.5
The sum of each digit is m + N + m + m + N + n = 3 × (M + n), so it can be divisible by 3