RIDDLE 1
5 is 4 and so is 9.
2 is 3, 3 is 5, and again 5 is 4
Based on that, 8 is 5, and 5 is 4.
And since 4 is 4, 4 is magical.
So what's 10?
RIDDLE 2
A man built it but didn't want it.
Another man bought it but didn't need it.
Another man used it but didn't know it.
What was it?
RIDDLE 3
Throw me out the window
And I'll leave a grieving wife,
Bring me back, but through the door,
And I'll be giving out new life.
What am I?