if c is a two - digit number , c+2 is divisible by 11 and c + 9 is divisible by 7 then c = ?

Show that if A (A is a positive integer) and A have sum of digit is divisible 9, then A divisible 9.

If a is in N and (a,5)=1 then a^100-1 divisible by 125

If F is a 4- digit number, divisible by 9,10 and 13 then the smallest value of F is.........

If B is not divisible by 24 and B is the greatest 5 - digit number  that the sum of all digits is 21 then B= ?

If B is not divisible by 24 and B is the greatest 5 - digit number that the sum of the sum of all digits is 21 then B = ?

If n is divisible by 100 and 4900 < n < 5100 then n = 

If m, n are consecutive odd numbers and  is divisible by 3 and 5 then m = 

If m, n are consecutive odd numbers and  is divisible by 3 and 5 then m =