Mathematics
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cr001
  • Member for 8 years, 4 months
  • Last seen more than a month ago
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All Questions Answers
Score Newest
answer
94
Why does cancelling change this equation?
Nov 6, 2015
answer
36
101102103104105106..............149150? What is the remainder when divided by 9?
Nov 17, 2015
answer
19
Prove that $(mn)!$ is divisible by $(n!)\cdot(m!)^n$
Dec 14, 2015
answer
14
Find area of triangle given one angle and the lengths its altitude divides the opposite side into
Aug 20
answer
12
How to prove that for $a_{n+1}=\frac{a_n}{n} + \frac{n}{a_n}$ , we have $\lfloor a_n^2 \rfloor = n$?
Aug 14, 2020
answer
9
Prove using induction that from a set of $n+1$ numbers from $\{1,2,..2n\}$, at least one number will evenly divide another.
Oct 23, 2015
answer
8
If $\sum_n^\infty a_n$ diverges such that $a_n$ converges to 0. Prove that there exists a subsequence of $a_n$ such that $\sum_k a_{n_k}$ converges.
Oct 29, 2015
answer
8
Proving the inverse of a bijection is bijective
Nov 6, 2015
answer
8
Given a number, how to find the length of its binary representation?
Nov 2, 2015
question
7
Is it possible to define a function $f$ from positive real to positive real such that $f(f(x)) = {1 \over x}$
Jan 27, 2019
Top Meta posts
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4
Is it possible to view my own answer for a deleted question?
Top network posts
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14
What are "desires of the flesh"?
5
The use of "-en" in a specific phrase
5
How does network pricing work exactly in cloud platforms? And how should I avoid dedicated pricing attacks?

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