Updated: Added Case 3.

Question :

One rabbit saw 6 elephants while going towards River.
Every elephant saw 2 monkeys are going toward river.
And Every monkey holds one parrot in their hands.

Now tell us how many animals are going towards river Or also known as animals going towards the river riddle

Hint : Use Maths Logic

Answer : scroll down..

Updated 21/04( Many Thanks for comments):

Case 1: Best Case Scenario ( minimum animals to make the statement true)

1 rabbit saw 6 elephants while going to river. So, its only rabbit going to river and not the elephants.

Every elephant saw 2 monkeys going to river. So, it could be same 2 monkeys seen by all the elephants. So there are 2 monkeys going to river.

Hence, total = 1+2 = 3

Case 2: Worst case scenario ( treating all as animals. i.e. max number of animals to make the statement true)

1 Rabbit

6 Elephants

6*2=12 Monkeys

Each monkey has 1 parrot in hand so 12 parrots.

Total = 1 + 6 + 12 + 12 = 31

Case 3: Treating Birds as Animals.

1 Rabbit, 2 Monkeys, 2 Birds

So total of 5.

Thanks all for your valuable comments.