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Sep
30
awarded  Explainer
Jul
16
comment Definition of Rational/ Irrational Numbers reguarding denominators
@Ned: thank you for noticing, i fixed it in the answer
Jul
16
revised Definition of Rational/ Irrational Numbers reguarding denominators
added 40 characters in body
Jul
16
revised Definition of Rational/ Irrational Numbers reguarding denominators
added 220 characters in body
Jul
16
awarded  Organizer
Jul
16
revised Definition of Rational/ Irrational Numbers reguarding denominators
tags and formatting
Jul
16
answered Definition of Rational/ Irrational Numbers reguarding denominators
Jul
16
suggested suggested edit on Definition of Rational/ Irrational Numbers reguarding denominators
Jul
16
answered can you help me solve my menu board dilemma?
Jul
15
awarded  Citizen Patrol
Jul
13
awarded  Yearling
Jul
13
revised What are the conditions needed by $n$ so that $2^{n+1}5^n-1$ is a prime number?
OP obviously meant to use {}'s around exponent (see his examples)
Jul
13
suggested suggested edit on What are the conditions needed by $n$ so that $2^{n+1}5^n-1$ is a prime number?
Jul
13
answered Function with single formula that have non zero value only in one small range
Jun
12
comment Prove $x^{n}-5x+7=0$ has no rational roots
since $x|5x$, concluding $x|7$ is absolutely correct.
Jun
5
comment Difference in Probability when 2 numbered cards are picked together and when 2 cards picked one after the other.
i think the question is about getting at least 1 odd card, not 2.
Jun
4
comment Dividing factorials is always integer
you can use induction in Pascal's triangle
May
22
answered How are these inequalities simplified?
May
19
answered Prove divisibility using linear congruences
May
19
awarded  Constituent