After reading through the fascinating comments to my post about Pi, I am left utterly perplexed as to what to conclude about the kav/kaveh gematriya.
On the one hand:
According to Ephraim's computer program, 111:106 is the third best ratio for numbers under 10,000. And it's the best that could be generated from a single letter difference - i.e. a kri/kesiv. Now, of course coincidences happen. But to have such a figure, resulting in Pi to five significant figures, emerging from precisely the word that the Passuk uses for the circumference, seems far too extraordinary to be relegated to coincidence. (This does not prove that God did it - a person could do such a thing too - but it is an ingenious feat of encoding, and the point is that it is a deliberate encoding.)
But on the other hand:
The kav/kaveh kri/ksiv occurs in Zechariah 1:16 too, where it is not referring to a circumference. This would indicate that it is merely a standard matter of confusion as to how the word should be spelled. (Malcolm argued that the fact that in Divrei Hayamim 2:4:2 it says kav without a kri/ksiv indicates that they knew the correct version and the kri/ksiv elsewhere is deliberately introduced, but I find this unconvincing; the existence of a kri/ksiv in Zechariah seems much more significant than the lack of kri/ksiv in Divrei HaYamaim.)
So is this kri/ksiv a deliberate way of encoding a closer value of Pi or not? I don't know what to make of it.