Question

find a and b so the following odd number is divisible by both 3 and 5 .8ab 4b

Answer 1

8ab 4b

it should be devide by both 3 and 5

So LCM is 15

Now consider b as 15. So we will get 4b = 4 x 15 = 60

We can take any number 1, 2, 3, etc as a

Now I am going to take 1 as a

8ab = 8 x 1 x 15 = 120

I hope this is what you are asking for