Whatsapp Riddle: 1 3 5, 2 4 ?

Whatsapp Riddles are getting challenging as days are going by.

The riddle no longer have the most obvious answer.

You must have surely received this riddle at least once by now on WhatsApp or Facebook.

Solve this if you are a genius!
1 3 5
2 4 ?
And answer is not 6.

So were you able to solve the riddle? Leave your answers in the comment section below.

If you get the correct answer, please share it with your friends and family on WhatsApp, Facebook and other social networking sites.