Q.
Which of
the following statements are true?
(a) If a
number is divisible by 3, it must be divisible by 9.
(b) If a
number is divisible by 9, it must be divisible by 3.
(c) A
number is divisible by 18, if it is divisible by both 3 and 6.
(d) If a
number is divisible by 9 and 10 both, then it must be divisible by
90.
(e) If two
numbers are co-primes, at least one of them must be prime.
(f) All
numbers which are divisible by 4 must also be divisible by 8.
(g) All
numbers which are divisible by 8 must also be divisible by 4.
(h) If a number exactly divides two numbers separately, it must
exactly divide their sum.
(i) If a number exactly divides the sum of two numbers, it must
exactly divide the two numbers separately.