All the trees have square roots.
Humphrey. (I was told this joke by an actual dad, it was his response to one of my jokes)
Me: You could get me a "world's best dad" mug. 4: You told me not to lie.
With a sah, dude
A baby hit by a snow blower
If they are under 16 you should just do them in your head.
What's the square root of sixty-nine? Eight-something!