You encounter an alien and overhear her counting: 0 1 2 3 4 10 11 12 13 14 20… How many digits (fingers, thumbs) do you think this species possesses (on all hands, paws, fins)? Solution the alien have two hands with each having 5 fingers and hve two wings just like Bat which cant fold its fingers inorder to count(each wing have 5 fingers which unfoldable). so totally 20 fingers with 10 fingers foldable and 10 unfoldable and two wings.

1. You encounter an alien and overhear her counting: 0 1 2 3 4 10 11 12 13 14 20… How many
digits (fingers, thumbs) do you think this species possesses (on all hands, paws, fins)?
Solution
the alien have two hands with each having 5 fingers and
hve two wings just like Bat which cant fold its fingers inorder to count(each wing have 5 fingers
which unfoldable).
so totally 20 fingers with 10 fingers foldable and 10 unfoldable
and two wings