Answer:
1,3,21,23,35 odd
Step-by-step explanation:
those aren't prime
One fifth is the same as

and 15 is the same as

So just times across,

×

Resulting in(1 x 15= 15, and 5 x 1= 5),

If you need/want to reduce it, divide both numbers by 5. Leaving you with the simplified answer of

or 3. Either answer works. :)
If you have any questions, just comment them down below :)
You learn more from failure than from success. Don’t let it stop you. Failure builds character.
maybe 1/5 (409) ::(880) 1+2