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Wednesday, November 11, 2009 - 10:26 AM
Posted by Terence
8874 Reads
Here's a quick way to sum a sequential series of numbers.Monday, October 26, 2009 - 11:52 AM
Posted by Terence
4971 Reads
By summing the correct continuous series of cubed numbers it is possible to produce a number which is itself a cube.Sunday, October 04, 2009 - 09:24 PM
Posted by Terence
3554 Reads
Did you know that whole numbers appear in a pyramid form?Monday, August 31, 2009 - 02:06 PM
Posted by Terence
4423 Reads
There exist numbers which have not just one but two positive cube roots, such as for instance, the number 1729, which is the result of 93 + 103 and 123 + 13. This article proposes an algorithm that produces an infinite supply of such numbers as well as presenting "near misses".
Thursday, July 30, 2009 - 12:06 PM
Posted by Terence
4940 Reads
Since the third century B.C. when Eratosthenes determined the first tables of the
prime numbers, the number 1 has never been considered to be prime because its
roots were easily determined as (-1)x(-1)=(+1). Because no doubts appeared
about this definition the usual sequence of prime numbers has been accepted as
2,3,5,7,11,13...Note: Abstract: Analysis of their linear distribution cannot reveal the spatial distribution of the Prime Number series. Keywords: Prime Numbers, concentric circles, radial lines,Goldbach's Conjecture.
Friday, March 14, 2008 - 10:51 AM
Posted by clay
18535 Reads
In honor of Pi Day 2008, I thought I would post a little article about the remarkable, infinite, and irrational Pi.Friday, November 23, 2007 - 08:03 AM
Posted by OU_Kevin
11414 Reads
It's a good question, and I've seen people bang their heads on desks over it. Try to think of it from a purely mathematical standpoint, and not a philosophical one...
Tuesday, May 22, 2007 - 09:28 AM
Posted by OU_Kevin
16126 Reads
This is a fascinating number, studied by the ancients and still a wonder today. It can be found in many sources in nature, most notably in naturally occurring spirals. Mathematically, the number can be found in the ratio between certain segments in a regular pentagon, in ratios between Fibonacci numbers, and can also be generated by some of the simplest sequences in math.
Tuesday, May 22, 2007 - 09:27 AM
Posted by berstff
12954 Reads
Based on square root algorithm.Take all digits except last digit and multiply by 20, then by last digit, and add square of last digit.
Thursday, November 16, 2006 - 08:26 PM
Posted by ArunChaganty
28568 Reads
Clay's article was an excellent, and a very well explained one too. I'd just like to add the bit about the probability of the odds of finding a person with the same birthday as you. Hopefully mine will be as descriptive as his.In this article, we shall explore some techniques of probability, and 'permutations and combinations'. This is going to be a slightly long article, but is very much educative, and I'll try to cover the entire thing from front to back. You can skip bits if you know them, but for the benefit of those who don't I've included them. I've finally posted a way of doing the question without any of this knowledge, but I still think you should read and understand what I'm trying to explain.
Thursday, August 17, 2006 - 11:19 PM
Posted by clay
56895 Reads
Here's a fun and easy application of probability to show the odds are good that at least two people in a relatively small group will share the same birthday.Saturday, May 20, 2006 - 05:36 AM
Posted by capperdisc63
16597 Reads
Here is a simple method of telling someone their age, the trick is not difficult to do or solve but it's quick and good fun!.
Sunday, May 14, 2006 - 03:41 PM
Posted by randomfact
11130 Reads
if you take any prime number, any at all, and square it and then subtract 1, the result will ALWAYS divide into or be divisible by 24!
Sunday, May 14, 2006 - 03:08 PM
Posted by secondmouse
6814 Reads
Pascal's triangle is generally associated with probability and/or cooefficients of algebraic power expansions. It also tells you powers of 11...
Friday, December 09, 2005 - 06:52 AM
Posted by bakic
22032 Reads
The square of a sum of first n natural numbers is equal to the sum of their cubes: Sunday, November 27, 2005 - 10:03 AM
Posted by rajan
10684 Reads
In the Fibonacci sequence, if you take any three consecutive numbers, add them, and divide the sum by 2, you always get the third number.
Sunday, November 27, 2005 - 09:59 AM
Posted by neileusebio
12296 Reads
Has anyone ever heard of the Monty Hall problem?Sunday, November 27, 2005 - 09:57 AM
Posted by the_desire
36672 Reads
The sum of any cube when reduced to a single digit will always be either 1, 8, or 9.Sunday, June 26, 2005 - 08:13 AM
Posted by mathmate
68230 Reads
The other day I was strolling in a part of the city where street vendors compete for the tourist dollar. I came across a young lady, felt marker in hand in front of an easel displaying a 6x6 array of numbers. It was a hot day, and it took an effort just to stand among the crowd at the same time understand what she was explaining. Curiosity won over me and here's what I found.
Thursday, April 07, 2005 - 09:36 AM
Posted by rajan
11771 Reads
The numbers 12 and 13 are peculiar...Thursday, March 31, 2005 - 09:25 AM
Posted by capperdisc63
86888 Reads
Have a go at solving these 15 math questions.Tuesday, September 07, 2004 - 11:25 AM
Posted by capperdisc63
186906 Reads
No symbols and characters allowed. (Here's a hint: it's not 999)Monday, August 09, 2004 - 09:46 PM
Posted by davidspimping
33068 Reads
A little knowledge and insight to the number 9.Wednesday, April 07, 2004 - 09:11 AM
Posted by carronx
40759 Reads
Fun little trick that invloves one of the most familar of all numbers: your phone number!Tuesday, March 23, 2004 - 03:08 PM
Posted by TOMaxwell
14657 Reads
In the Olden Days, when a number ended in the decimal .5, we used to round numbers up to the next highest whole number. It is more accurate to always round to even numbers, e.g., the number 23.5 rounds UP to 24, and 24.5 rounds DOWN to 24. Here is a Proof that Rounding to Even Numbers is far more accurate: Thursday, February 26, 2004 - 03:52 PM
Posted by kayer35
12982 Reads
ORLANDO, Florida - December 2, 2003 -- Michael Shafer, a 26 year-old volunteer in the Mersenne.org research project called the Great Internet Mersenne Prime Search (GIMPS), has discovered the largest known prime number. Shafer used a Michigan State University lab PC and free software by George Woltman and Scott Kurowski as part of an international grid of 211,000 networked computers in virtually every time zone of the world.
Monday, December 15, 2003 - 11:02 AM
Posted by sancle
58892 Reads
Ask anyone to select a number less than 1000, and to divide it respectively by 7, 11, and 13, giving you the three remainders. You will then be able to tell him what number he originally selected.Monday, June 09, 2003 - 10:07 AM
Posted by clay
47207 Reads
The number classification you’re probably most familiar with is odd and even. Even numbers can be divided into two equal parts without a remainder. Odd numbers can’t. End of story, right? Not according to Boethius. He divides even numbers into three types.
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Other Stories
- A fast way to sum a series of numbers (Nov 11, 2009)
- Summing Cubes to Produce a Cube (Oct 26, 2009)
- unusual whole number sequence (Oct 04, 2009)
- Numbers Having Two Positive Cubes (Aug 31, 2009)
- Speculation about Prime Number Space (Jul 30, 2009)
- In Pursuit of Pi (Mar 14, 2008)
- Simple Summation Formula (Feb 27, 2008)
- 0.999...=1 ? (Nov 23, 2007)
- Large Special Products Factorization Algorithm (Jun 24, 2007)
- the golden number (May 22, 2007)
