Tell which is true or false
a)If a number is divisible by 3,it is divisible by 9 also
b)If a number is divisible by 9,it is divisible by 3 also
c)If a number is divisible by both 9 & 10,it is divisible by 90 also
d)If two no's.are co prime , at least of them will be prime
e)All numbers which are divisible by 4 must also be divisible by 8
g)If a number exactly divides two numbers separately, it must exactly divide the two sum
h)If a number exactly divides the sum of two numbers, it must exactly divide the number separately.



Please answer my questions ??