WEBVTT
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So, time for the solution. I asked you before - I gave you a hint saying that
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the third row here, which looks like some kind of binary, is equal
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to the Roman numeral row above.
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In the Roman numeral row above, we have a house with 7 in it is equal to
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142,857 and this is equal to something with a house in it!
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Well, we already know that that something is a 7 so we can equate this 7
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with 0100. Now, this is not binary because
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100 in binary is 8, but it is binary reflected Gray code.
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So this is binary reflected Gray code, and once you remember that we can do the rest.
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This is equal to - 1111 - in binary reflected Gray code -
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is 10. 0101 is 6, so we have 10 to the power of 6,
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minus 0001 which is just 1,
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and all this divided by 7.
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Now, 10 to the power of 6 minus 1 is 999999
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That's strange! Is 999,999 divided by 7,
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equal to the 7 in the house, which means it's equal to -
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142,857. Is it?
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Get out your calculators and check! It is! How strange!