I cant give theanswer on Facebook as it was a condition.

[Gronbog]

The rabbit saw 9 elephants while going to the river, so the rabbit was going but the elephants were not.

Every elephant saw 3 monkeys going to the river, which is ambiguous. There could be 3 monkeys or an unknown number because the use of the word "every" does not restrict things to the 9 elephants seen by the rabbit. I therefore say that 3 monkeys were going to the river.

Each monkey had a tortoise in each hand, so 6 tortoises.

So mathematically we get 10.

These things usually have an out-of-the-box thinking component and the issue of tense is a possibilty. This tells me that we numbers guys are probably on the wrong track.