How many times can you subtract five from twenty-five?
I am an odd number. Take away one letter and I become even. What number am I?
If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?
It's cheaper to take two friends at the same time. In this case, you would only be buying three tickets, whereas if you take the same friend twice you are buying four tickets.
Place three matches on a table. Tell a friend to add two more matches to make eight.
Add two matches to make a roman numeral eight. ( VIII )