Does the bible say that Pi = 3?

23 He made the Sea of cast metal, circular in shape, measuring ten cubits from rim to rim and five cubits high. It took a line of thirty cubits[o] to measure around it. 24 Below the rim, gourds encircled it—ten to a cubit. The gourds were cast in two rows in one piece with the Sea. – 1 Kings 7:23-24

I’m not sure what a “Sea” is, but it’s circular (sounds like a cylinder), has a diameter of 10 cubits, and it takes 30 cubits to go around it – the circumference.  But we know now that Pi * D = Circumference, …

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May 8th, 2012 | Tags: , , , , , , , , , , , , , | Category: Christianity, Hot Topics, Mathematics | One comment

A slick quick way for determining if a number is divisible by 7 (VIDEO)

I had never seen this before–came across a YouTube video explaining it, though the proof is trivial (he doesn’t do it in the video):

So here’s the rule.

Take any big number, say 439239619 (this is a multiple of 7 from how I generated it, but the trick will discover that…in fact, the only prime factors of this particular number are 7 and 13).

The rule is: remove the last number, double it, and subtract the doubled value from whats left of the original.  So 9 is the last digit.  Double it to get 18.  Then subtract 18 from 43923961 (the number formed by …

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March 14th, 2010 | Tags: , , , , , , | Category: Mathematics, Teaching, Tricks | 2 comments
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