I came up with those questions following recommendations from the SMF admin forums. Generally speaking, bots have most of the simple questions memorized, and can actually Google the question.

Go Google "What the square root of nine plus the square root of four?" verbatim, you'll be surprised at the fact that it can answer them so easily. I'm not even certain these won't be easily cracked. We'll have to see.

That said, someone finally programmed bots to answer my questions, we are getting new ones.

Type in the square root of nine plus the square root of four (spell out the answer)? five

What is the fifth word in the following phrase : "The only thing we have to fear is fear itself"? have

Type in eighteen minus the square root of forty-nine (spell out the answer)? eleven