Sven Groot said:
I got it, but only by coincidence: I had a series of classes on lambda calculus last week and I recognised the Church encoding of the natural numbers as lambda functions (as contextfree said). Simply count the level of recursion to get the number, in this
case it was 9-deep, so it represents '9'.
I recognised the other question as product notation. Going by the frequent use of '3' and how 3*3 == 9 I figured the answer was the same.
Note that I actually advocate implementing something similar to this as an actual captcha in future. Keep it just as difficult, I like the idea of there being a forum with just me on it
Component factory have something similar, you are asked
Answer the question to prove you are not a spam bot, but a human.
Binary number 1001 is what in decimal?
how many fingers on a human hand?
Obviously Phil used to lurk around the channel 9 forums a lot so I wonder why the 1001 binary? The long and the short of it is spam in his fora is now almost non-existent, whereas it is a growing problem in the Sandquist fora. Look at the mix comments and
here on channel 9, a lot of the posts are begining to get targeted more and more.