1
This number is considered unlucky.
2
It is the result when you take two from twenty.
3
It is the sum of ten and five.
4
...Thousand Leagues Under the Sea, by Jules Verne.
5
An octopus has got ...tentacles.
6
There are ...fingers at one hand.
7
We have ...eyes.
8
Each person has got one in the middle of his/her face.
9
A cow has got ...legs.
10
Both our hands have ...fingers.
