Academic questions...
- Thread starter Satya
- Start date
Yeah. Sorry about that. I'm useless at maths but half decent at finding information. This any use:
http://www.mathwizz.com/fractions/help/help4.htm
http://www.mathwizz.com/fractions/help/help4.htm
S
Shai Gar
I just don't reduce them, if I can get away with it. If I know how to come up with the answer, then whoever is looking at the result can reduce their own damn fraction if they're that particular
Factoring really isn't that bad. You just have to know the trick for 2, 3, 4, and 5. You'll rarely need anything higher.
Wow, Euclidean Algorithm! I completely forgot about that! Great find!
Well, there are a few:
Even numbers can be factored by two.
If you add both digits together and that number is divisible by three, then the original number is divisible by three (63 --> 6+3=9 --> 63 is divisible by three)
I forget the rule to four, but that's okay cuz I never check for four anyways.
If the number ends in a 5 or 0, it is divisible by five.
If a number is divisible by both two and three, then it is divisible by six.
Even numbers can be factored by two.
If you add both digits together and that number is divisible by three, then the original number is divisible by three (63 --> 6+3=9 --> 63 is divisible by three)
I forget the rule to four, but that's okay cuz I never check for four anyways.
If the number ends in a 5 or 0, it is divisible by five.
If a number is divisible by both two and three, then it is divisible by six.
Wow, I did not know the tricks for the second and last one. It feels like my elementary education was seriously lacking in the math department. I wonder what the trick for 4 is.
^^ That's what I always do. There's really not much point in checking.
There is a pattern with four, like all the other numbers, that's not too hard to figure out:
4, 8, 12, 16, 20 || 24, 28, 32, 36, 40...
ends in: 4, 8, 2, 6, 0 || 4, 8, 2, 6, 0...
So if it's divisible by four, it would end in one of those numbers, in increments of 20
There is a pattern with four, like all the other numbers, that's not too hard to figure out:
4, 8, 12, 16, 20 || 24, 28, 32, 36, 40...
ends in: 4, 8, 2, 6, 0 || 4, 8, 2, 6, 0...
So if it's divisible by four, it would end in one of those numbers, in increments of 20