and met another bird which asked them
'how many are you ,are you hundred?'
Then the birds answered,
"No we are not, to be hundred we need half of us plus you."
Find the number of flying birds.
--- Another version of same puzzle ---
Some birds were flying and met a bird on their way.
The bird greeted them, "Hello hundred".
They said, "we're not hundred, we need half of us plus you to make us hundred."
How many birds were flying?