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Neil W
  • Member for 8 years, 5 months
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32 votes

Is there a simple function that generates the series; $1,1,2,1,1,2,1,1,2...$ or $-1,-1,1,-1,-1,1...$

16 votes

Can I use the "Secretary Problem" to find the worst candidate, too?

10 votes

Is Lewis Carroll's reasoning correct?

10 votes

How find this equation integer solution:$x^2y^2=4x^5+y^3$

9 votes
Accepted

Every question solved by one of two students

8 votes
Accepted

Solve in integers: $x^2 = y^2 + y + 1$

8 votes
Accepted

A three-way duel (probability puzzle)

7 votes

How can I write the numbers 5 and 7 as some sequence of operations on three 9s?

6 votes

How to know if a term is divisible by 10

6 votes
Accepted

Why can't $x^2+y^2+z^2$ be prime?

5 votes
Accepted

On last digit of 4 consecutive primes less than 10 apart

5 votes

Why a false statement can imply anything?

5 votes

Arithmetic mean. Why does it work?

4 votes

Prove all multiples of $U$ contain all the digits $0$ to $9$

4 votes

How to tell if a Fibonacci number has an even or odd index

3 votes
Accepted

Finding the recurrence relation for number of ways to deposit n dollars

3 votes
Accepted

About "Trichotomy Law for Real Numbers"

2 votes

Divisible by what?

2 votes

Two people A and B throwing dice

2 votes

Prove that $\lim\limits_{n\to\infty}\left(\sqrt{n^4+n^2+20n+7}\,-\,\sqrt{n^4+n^2+1} \,\right)=0$

2 votes

Internet problem solving contest question

2 votes
Accepted

Equation: $(x^2-9y^2)^2=33y+16$

2 votes

Mathematical Induction (summation): $\sum^n_{k=1} k2^k =(n-1)(2^{n+1})+2$

2 votes

Optimize function on $x^2 + y^2 + z^2 \leq 1$

2 votes

If $ w_1 $and $ w_2 $ are the roots of $w^2-2sw+t=0$, then $|w_1|=|w_2|\iff 0<s^2/t\le1$

2 votes
Accepted

The Minimum of a Sum of Continuous functions

2 votes
Accepted

The difference between the premium paid and the expected claim

2 votes
Accepted

Proof by induction, $2^{n} > n^{2} - 2$

1 vote

Intriguing problem based on number theory.

1 vote
Accepted

Finding appropriate m,n