Carry on Smiling
Reputation
100/100 score
5 58 120
Impact
~553k people reached

# 43,633 Reputation

5 today
 +10 2 hours ago upvote Find a number such that half of it is a square,a third of it is a cube,and a fifth of it is a fifth power +10 3 hours ago upvote Question about injective functions -15 2 hours ago unaccept What are the odds of flipping a coin 100 times and seeing HHHHT?
225 yesterday
 +50 18:38 5 events A Combinatorics Problem with x+y = z +40 19:34 4 events Prove that $p^2 - 4qr$ ($p,q,r$ odd natural numbers) is never a perfect square +35 23:56 3 events Find a number such that half of it is a square,a third of it is a cube,and a fifth of it is a fifth power +35 17:02 3 events Number of ways of writing an integer as a sum of other integers +25 00:45 2 events Analogue of a “perfect” polynomial fit in $\mathbb{R}^p$, $p > 2$ +10 23:20 upvote Loaded coin: probability I will never get two heads +10 18:19 upvote Is it possible for two triangles to be different if the sides of one is equal to another? +10 09:31 upvote divisibility relations in sets. +10 03:25 upvote Show that, of any set of $2^{n+1}-1$ positive integers numbers is possible choose $2^{n}$ elements such that their sum is divisible by $2^{n}$.
215 2 days ago
 +50 18:15 8 events Remainder of $2^{125}/13$ +30 19:53 4 events Prove that $a_n$ is a perfect square +32 / -2 18:05 5 events Prove that ${2^n-1\choose k}$ and ${2^n-k\choose k}$ ar always odd. +25 02:37 2 events Why is Nim solvable with the xor operator? +20 13:51 2 events Why is $10^k - 1$ divisible by $9$? +20 03:48 2 events Counting the numbers of linear combination +20 02:11 2 events Find all possible three digit numbers whose digits' sum equals 12 +10 08:41 upvote What is the most complex mathematical topic? +10 00:02 upvote What are the odds of flipping a coin 100 times and seeing HHHHT? 22:36 upvote Spanning trees of the complete graph minus two edges 20:25 upvote Why is $15m=0\pmod {18}$ equivalent to $3m=0 \pmod {18}$? 19:49 upvote Show that, of any set of $2^{n+1}-1$ positive integers numbers is possible choose $2^{n}$ elements such that their sum is divisible by $2^{n}$. 18:40 upvote Analogue of a “perfect” polynomial fit in $\mathbb{R}^p$, $p > 2$
260 Jul 24
239 Jul 23
30 Jul 22
15 Jul 21
5 Jul 20
48 Jul 19
128 Jul 18
100 Jul 17
70 Jul 16
25 Jul 15
8 Jul 14
50 Jul 12
81 Jul 11
35 Jul 10
45 Jul 9
2 Jul 8
10 Jul 5
10 Jul 4
55 Jul 3
50 Jul 2
7 Jul 1
-5 Jun 29
10 Jun 25
10 Jun 24
12 Jun 23
10 Jun 22
10 Jun 21