1. How many times can you subtract the number 2 from the number 25?
2. A small boat is floating in a bath tub. At first the boat carried a small metal cannon, but this fell off and sank to the bottom of the bath tub. During this occurrence, no water was taken into the boat. What happened to the water level as a result of this?
3. What number must be added to both 100 and to 20 to obtain the ratio 3:1? (The same number must be added to each)
4. Twice six is eight of us,
Six are three of us,
Nine are only four of us,
twelve are only six of us,
Five are but for of us.
What are we?