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May
17
revised Closed form of S(n):
added 6 characters in body
May
17
comment Find the integer x: $x \equiv 8^{38} \pmod {210}$
Sorry, I made a typo in that line. It should say $x\equiv 4 \bmod 5$
May
17
revised Find the integer x: $x \equiv 8^{38} \pmod {210}$
edited body
May
17
comment Closed form of S(n):
In fact it turns out no matter how you play the game your score is always going to be $\frac{n(n-1)}{2}$. It's impossible to do better or worse.
May
17
answered Closed form of S(n):
May
17
comment Closed form of S(n):
In fact can you find a way to split them up that gives a number different than $28$?
May
17
comment Closed form of S(n):
Do you have a counterexample?
May
17
comment Closed form of S(n):
When starting with $8$ blocks and using my method you get a score of $28$
May
17
comment Closed form of S(n):
I think the best strategy is always dividing stacks as equally as possible.
May
17
comment What are the chances of 2 choosing the same 10 questions AND same answers? 15 Qs, 5 As
This is actually a very important question. Do they first choose the questions randomly? Or is the probability space for every possible combination of questions/answers uniform?
May
17
comment Oriented graph VS directed graph?
yes, that is the only difference. the orientable graphs are all the directed graphs except the ones with double arrows.
May
17
answered Show that a discrete metric space is finite.
May
17
comment Oriented graph VS directed graph?
Yes, if you do that then you get an oriented graph. The difference is oriented graphs cannot have two arrows between two vertices.
May
17
revised Find the integer x: $x \equiv 8^{38} \pmod {210}$
added 101 characters in body
May
17
comment Find the integer x: $x \equiv 8^{38} \pmod {210}$
Oh I see, I got confused, thank you.
May
17
comment Find the integer x: $x \equiv 8^{38} \pmod {210}$
But the OP used $a^p\equiv a \bmod p$. The other format is better for the reduction.
May
17
answered Find the integer x: $x \equiv 8^{38} \pmod {210}$
May
17
revised Oriented graph VS directed graph?
added 1 character in body
May
17
comment “Vectors aren't really numbers” - how sound is that statement?
What are numbers?
May
17
comment Real world example of need for quadratic equation
I think OP wanted examples, not the names of the fields.