I'm hardly ever online (long story), but since I happen to be today, I just wanted to drop in my 2 cents --

A. Explain why the Bible repeatedly says "Dew which falleth [or falls] from heaven [the sky]" when it is a fact that dew forms in place upon the grass, by condensation.

B. Explain why, in both narratives of the building of the temple (1 Kings, and 2 Chronicles), Solomon builds a basin, round as a compass, with a radius of 10 cubits, and a circumference of 30. PI = 3.1415926535, therefore it should be 31.

Others exist too, but there's a couple of glaring ones.