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/sci/ - Science & Math

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4288741 No.4288741 [Reply] [Original]

/sci/ I saw this posted here like a month ago, but I can't figure all these out.
Can someone explain 1,3,4,5, and 11 please?
also, on 5, why isn't it 1/2? From my (incredibly) limited knowledge of modulus, I would think that 7 goes into 1/2 0 times, with a remainder of 1/2, so it would be 1/2. Do mods work differently if a<1? Am I just a dumbass? The only experience I have with mods was during a one semester intro to software engineering, and that was barely anything.

>> No.4288747

http://boingboing.net/2009/01/29/clock-for-geeks-1.html

>> No.4288752

>putting 6.9 instead of 7

did they really move the 7 .1 away from where it normally would be or are they just trolling?

>> No.4288761

>>4288752
its 6.9 repeating, which is equivalent to 7.

>>4288747
thanks for the link.
The wikipedia page on modulus is suprisingly unhelpful, but whatever.

>> No.4288772

>>4288761

oh sorry, I didn't notice the vector over the 9

>> No.4288806
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4288806

More accurate, if more simple arithmetic

>> No.4288821 [DELETED] 

>>4288741
i think they mean -2, 1/2 mod7 makes no sense.

>> No.4288832

>>4288806

Math Geek clock: 4th grade edition

>> No.4288839
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4288839

>>4288806
>3(pi - .14)

>> No.4288854
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4288854

>>4288806
>>4288839

>> No.4288868

>>4288821
4.

2*4 =- 1 mod 7. Hence 4 = 2^-1.

>> No.4288870

>>4288868
Where =- is meant to be ghetto congruence, not a negation.

>> No.4288892

>>4288832
That is what I said, essentially, excepting the nastiness about grade level.

If you're going to have an attitude about the concept
that you know more than someone who is 9, shut up and grow up.

Or, put another way: people could shame you by writing one
in such a way that you couldn't solve the value even given the position on the clock face;
does that make you stupid, them smug?

Gawd, attitude shows heavily all over 4chan, huh?

>> No.4288991

>>4288839
Fucking fuck xml hax

<span class="math">3(pi - (pi - 3))[/spoiler] even looks better.