256 is "oddly specific number"...
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You know, I never really understood that hill reference ...
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Also, do you make change?
Is there any point in making change?
[spoiler]Wikipedia: Use of the Zimbabwean dollar as an official currency was effectively abandoned on 12 April 2009. The Zimbabwean dollar is due to be demonetised (no longer legal tender) by the end of 2015.[/spoiler]
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You wouldn't want to sell yourself short, would you?
Shortselling got a few people rich these years ...and i mean, how many people have a trillion dollar coin?
If they did, I wouldn't want one on my palm.
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I don't think that's a prime number in any integer base.
Prime-ness is independent of the base used to display the value, but it is a concept that is only defined for integers.
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True, but 42 in base 10 is not the same as 42 in base 11.
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4b+2 always has 2 as a factor.
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12 is composite in base 10. 12[base 11] is 13 in base 10, which is prime.
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True, but 42 in base 10 is not the same as 42 in base 11.
While true, it's also not the same number. You're mixing up what it is and what it is represented as, and primeness is not a property of the representation. It's conventional in this time and place to assume that a number presented without further information or context is in base 10.
If not that, what base is that “11” in?
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4b+2 always has 2 as a factor.
...when b is a positive integer. 42 base 1/4 = 3 base 10, which is prime.
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Prime-ness is independent of the base used to display the value,but it is a concept that is only defined for integers.
Modular arithmetic to the rescue!
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I guess my reference to "I don't make jokes in base 13" was too obscure.
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But how else do you make six multiplied by nine be 42?
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But how else do you make six multiplied by nine be 42?
By having the universe be fundamentally Belgiumed.
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So what are your seven other rules of thumb?
Oh, I thought the rules with powers of 2 were rules of thumb and the ones with powers of 10 were rules of finger...