Question

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.​

Answer 1

Answer:

b) option is correct

for example

45, 63 , 90, is divisible by 9.

These numbers are also divisible by 3

hope it helps you please mark me brainiest

Answer 2

(a) False

(b)True

(c) True

(d)True

(e) False

(f)True