1. How many holes are there in a ten-pin bowling ball?

2. How many legs are there on a shrimp?

3. How many hulls are there on a catamaran?

4. How many pennies in a pre-decimal pound?

5. How many keys are on a piano?

6. How many labours performed by Hercules?

7. How many inches are there in a cubit?

8. How many shillings in a Guinea?

9. How many numbers are there on a bingo board?

10. How many states in the USA are there beginning with the letter M?  

Answers

1. 3

2. 10

3. 2

4. 240

5. 88

6. 12

7. 18

8. 21

9. 90

10.  8.  Maine, Maryland, Michigan, Massachusetts, Minnesota, Montana, Missouri and Mississippi.