<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[RSS Feed]]></title><description><![CDATA[RSS Feed]]></description><link>http://direct.ecency.com</link><image><url>http://direct.ecency.com/logo512.png</url><title>RSS Feed</title><link>http://direct.ecency.com</link></image><generator>RSS for Node</generator><lastBuildDate>Wed, 22 Apr 2026 08:21:27 GMT</lastBuildDate><atom:link href="http://direct.ecency.com/created/numbertheory/rss.xml" rel="self" type="application/rss+xml"/><item><title><![CDATA[Multiplying a Number and Its Vortex Sum Results in the Same Vortex Sum]]></title><description><![CDATA[In this video I show that multiplying a number or its vortex sum (summing digits until a single digit is obtained) yields the exact same vortex sum. This is the cause of nearly all of the amazing vortex]]></description><link>http://direct.ecency.com/hive-111030/@mes/multiplying-a-number-and-its-vortex-sum-results-in-the-same-vortex-sum</link><guid isPermaLink="true">http://direct.ecency.com/hive-111030/@mes/multiplying-a-number-and-its-vortex-sum-results-in-the-same-vortex-sum</guid><category><![CDATA[hive-111030]]></category><dc:creator><![CDATA[mes]]></dc:creator><pubDate>Tue, 02 Dec 2025 05:07:15 GMT</pubDate><enclosure url="https://images.ecency.com/p/QVdSJhgNm7rytEdw6Y8ua3ELysg9umAYoQxsRewpowcr9BKTDetB9PLMRToc4HM93DVgGpU6H6ArTGV1RLqNvkN6DbQSwDNPytCCdkmwcSztrL6DFJN2BV9eG7pPAB5yfezM1hwyNL5nEuPfyfkQcQvAY7a7nbq56eTv7GAC6TUE3VJNk33TFpb?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[Using Base 10 to Calculate Vortex Sum of Different Number Systems]]></title><description><![CDATA[In this video I show that the vortex digit sum (summing the digits until we obtain 1 digit) for any base number system can be obtained quickly by using the default Base 10 Modulo function available in]]></description><link>http://direct.ecency.com/hive-111030/@mes/using-base-10-to-calculate-vortex-sum-of-different-number-systems</link><guid isPermaLink="true">http://direct.ecency.com/hive-111030/@mes/using-base-10-to-calculate-vortex-sum-of-different-number-systems</guid><category><![CDATA[hive-111030]]></category><dc:creator><![CDATA[mes]]></dc:creator><pubDate>Fri, 28 Nov 2025 05:16:57 GMT</pubDate><enclosure url="https://images.ecency.com/p/FUkUE5bzkAZSUQtscfU67XyuspKfVPvhJ6PgMwaumQRFSqc8YzUHX1PkSVPq2dgTHUyhjh4fxBMAVn6JpuSsBzvXjMbvuECJbbQ1uYCgUnyMkbJmWQs49UFhu1G3opYPUxhPVJqeuVdNpLbS3G8Qisbb1iXugLgcsRBm?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[Vortex Math: Summing Digits of a Number is the Remainder AND Repeating Digit of Division]]></title><description><![CDATA[In this video I show that not only is the vortex sum (summing of digits a number until 1 digit remains) is the remainder when dividing by the largest single digit, but this same number repeats indefinitely]]></description><link>http://direct.ecency.com/hive-128780/@mes/qqftdckj</link><guid isPermaLink="true">http://direct.ecency.com/hive-128780/@mes/qqftdckj</guid><category><![CDATA[hive-128780]]></category><dc:creator><![CDATA[mes]]></dc:creator><pubDate>Wed, 12 Nov 2025 23:10:06 GMT</pubDate><enclosure url="https://images.ecency.com/p/99pyU5Ga1kwr5bsMXthzYLbcngN4W2P8NtU9TWTdHC3HaQbjuuRfHesJoVydaeXH28gk1jHn5daMCWAdfA5vEk1v8QRdwC6pqYhUNckx3bHqGH7XuePaQGbZhw9nvPGSGn?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[Converting Between Different Number Systems]]></title><description><![CDATA[In this video I show how to convert between different base number systems by first writing the number in its equivalent base exponential addition form, and then changing the base. For example, converting]]></description><link>http://direct.ecency.com/hive-128780/@mes/mxyppsmx</link><guid isPermaLink="true">http://direct.ecency.com/hive-128780/@mes/mxyppsmx</guid><category><![CDATA[hive-128780]]></category><dc:creator><![CDATA[mes]]></dc:creator><pubDate>Tue, 04 Nov 2025 23:40:06 GMT</pubDate><enclosure url="https://images.ecency.com/p/99pyU5Ga1kwr5bsMXthzYLbcngN4W2P8NtU9TWTdHC3HaQbjuuRfHesJoVwXtQ2kH543J6t5LSm5T9qmnGtqDrTCedAiuBBqEt42tF5ZrE8w2BPB19WSP6USYn6NV9aSN2?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[The Number 0 and 10 in General Number Systems]]></title><description><![CDATA[In this video I go over a quick overview of number systems, and show how the base or radix (Latin for "root") serves as the transition point when counting past the single digits. For example,]]></description><link>http://direct.ecency.com/hive-128780/@mes/tpvefroy</link><guid isPermaLink="true">http://direct.ecency.com/hive-128780/@mes/tpvefroy</guid><category><![CDATA[hive-128780]]></category><dc:creator><![CDATA[mes]]></dc:creator><pubDate>Mon, 03 Nov 2025 23:20:06 GMT</pubDate><enclosure url="https://images.ecency.com/p/99pyU5Ga1kwr5bsMXthzYLbcngN4W2P8NtU9TWTdHC3HaQbjuuRfHesJoVvQMRxJBVsJmHCuz3BMPZLuEChRtGLHdY7Q5JhhH4tGj6c8aANKxgm7uZzW85xqtiQk6eFhfL?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[Elemental Subset Sum Problem]]></title><description><![CDATA[Math Problem: Use 3 numbers to sum to 50: 1,5,9,11,21,25. You could try every possible unordered pair and check whether that and one of the remaining numbers sums to 50. That methodology requires you to]]></description><link>http://direct.ecency.com/hive-163521/@leprechaun/elemental-subset-sum-problem</link><guid isPermaLink="true">http://direct.ecency.com/hive-163521/@leprechaun/elemental-subset-sum-problem</guid><category><![CDATA[hive-163521]]></category><dc:creator><![CDATA[leprechaun]]></dc:creator><pubDate>Sat, 06 Jul 2024 12:56:12 GMT</pubDate><enclosure url="https://images.ecency.com/p/PB8ro82ZpZP35bVGjGoE93K3E4U5KX8KtMBJ2rgean6h1zHoF6qZgbZGqbASLamGxc6jRCWNHyCyim46M9bdq8hMwef4eZmrjD1q2YhWzBnb5nYn?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[Result of the Day 3 [Problem A] Challenge of my July 2021 Math mini-contest for D.Buzz]]></title><description><![CDATA[Day 3 Problem A Math mini-contest for D.Buzz for July 2021 A random integer between -200 and +200 is multiplied by a rational number between -2 and +2. The ranges are inclusive. What is the range of the]]></description><link>http://direct.ecency.com/hive-163521/@savvyplayer/result-of-the-day-3-problem-a-challenge-of-my-july-2021-math-mini-contest-for-d-buzz</link><guid isPermaLink="true">http://direct.ecency.com/hive-163521/@savvyplayer/result-of-the-day-3-problem-a-challenge-of-my-july-2021-math-mini-contest-for-d-buzz</guid><category><![CDATA[hive-163521]]></category><dc:creator><![CDATA[savvyplayer]]></dc:creator><pubDate>Sat, 07 Aug 2021 12:35:27 GMT</pubDate><enclosure url="https://images.ecency.com/p/4i88GgaV8qiFkxbnGCXnHPUK3daVLCQA4oDc4ixpKQ62KLqv333JiWiYt6NDr2sWqhLy74fup1rd8b1XKBQQWfYyvYXAmss5cA1PUE4jhZGZ3VHTW8FyrncL94?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[Result of the Day 2 [Problem B] Challenge of my July 2021 Math mini-contest for D.Buzz]]></title><description><![CDATA[Day 2 Problem B Math mini-contest for D.Buzz for July 2021 The decimal number 16,954.248 converts to 1,244.650 in another number system. What is the base of the other number system? The problem has originally]]></description><link>http://direct.ecency.com/hive-163521/@savvyplayer/result-of-the-day-2-problem-b-challenge-of-my-july-2021-math-mini-contest-for-d-buzz</link><guid isPermaLink="true">http://direct.ecency.com/hive-163521/@savvyplayer/result-of-the-day-2-problem-b-challenge-of-my-july-2021-math-mini-contest-for-d-buzz</guid><category><![CDATA[hive-163521]]></category><dc:creator><![CDATA[savvyplayer]]></dc:creator><pubDate>Sat, 07 Aug 2021 10:10:18 GMT</pubDate><enclosure url="https://images.ecency.com/p/HNWT6DgoBc1692QWn5trsLBYecSp3jKD1kzdmSEJpN841mUfXKKzBn3XGeARqFD9WSaQJcUnZb4vR5rnfjPbWJnPFbR5AqM5jQo6EBAcKZEnxwRnVGSuhdcLEuc?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[Math mini-contest problem on D.Buzz for July 2021 [Day 2 - Problem B] 😎]]></title><description><![CDATA[Math mini-contest problem on D.Buzz for July 2021 [Day 2, Problem B] 😎 The decimal number 16,954.248 converts to 1,244.650 in another number system. What is the base of the other number system? Rules]]></description><link>http://direct.ecency.com/hive-193084/@savvyplayer/julymathday2b</link><guid isPermaLink="true">http://direct.ecency.com/hive-193084/@savvyplayer/julymathday2b</guid><category><![CDATA[hive-193084]]></category><dc:creator><![CDATA[savvyplayer]]></dc:creator><pubDate>Thu, 29 Jul 2021 19:01:00 GMT</pubDate></item><item><title><![CDATA[Math mini-contest problem for Day 4 on D.Buzz for March 2021 😎]]></title><description><![CDATA[Math mini-contest problem for Day 4 on D.Buzz 😎 Ahmad played with numbers again. Starting with a positive number N, he added 3, then used the sum to divide N. The addition of 3 and using the sum to divide]]></description><link>http://direct.ecency.com/hive-193084/@savvyplayer/marchday4math</link><guid isPermaLink="true">http://direct.ecency.com/hive-193084/@savvyplayer/marchday4math</guid><category><![CDATA[hive-193084]]></category><dc:creator><![CDATA[savvyplayer]]></dc:creator><pubDate>Thu, 25 Mar 2021 07:00:15 GMT</pubDate></item><item><title><![CDATA[Amazing Math Calculation Method: Multiplying 1's Proof]]></title><description><![CDATA[In my last video I showed how to multiply numbers containing only 1's together very quickly using an amazingly easy method. In this video I go over a proof, or more like a brief explanation, showing why]]></description><link>http://direct.ecency.com/hive-128780/@mes/amazing-math-calculation-method-multiplying-1-s-proof</link><guid isPermaLink="true">http://direct.ecency.com/hive-128780/@mes/amazing-math-calculation-method-multiplying-1-s-proof</guid><category><![CDATA[hive-128780]]></category><dc:creator><![CDATA[mes]]></dc:creator><pubDate>Tue, 04 Aug 2020 02:51:21 GMT</pubDate><enclosure url="https://images.ecency.com/p/S5Eokt4BcQdk7EHeT1aYjzebg2hC7hkthT45eGKsTj5vot5sK3oKZGJ1KukGW2XaWWU8g6a?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[🔥#MESScience 2: Vortex Math Part 1: Number Theory and Modular Arithmetic ]]></title><description><![CDATA[Watch on 3Speak - Odysee - BitChute - Rumble - YouTube - Notes - PDF notes - Excel file - Summary - Vortex Math playlist - MES Science playlist In #MESScience 2 I cover a relatively unknown concept called]]></description><link>http://direct.ecency.com/hive-128780/@mes/messcience-2-vortex-math-part-1-number-theory-and-modular-arithmetic</link><guid isPermaLink="true">http://direct.ecency.com/hive-128780/@mes/messcience-2-vortex-math-part-1-number-theory-and-modular-arithmetic</guid><category><![CDATA[hive-128780]]></category><dc:creator><![CDATA[mes]]></dc:creator><pubDate>Mon, 03 Aug 2020 21:38:24 GMT</pubDate><enclosure url="https://images.ecency.com/p/S5Eokt4BcQdk7EHeT1aYjzebg2hC7hkthT45eKxuhYAKEL5dkMDfvn5UEEso4i4XjdSCpsp?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[The Mathematical Properties Of The Enneagram; Part Two]]></title><link>http://direct.ecency.com/enneagram/@soddenguru/the-mathematical-properties-of-the-enneagram-part-two</link><guid isPermaLink="true">http://direct.ecency.com/enneagram/@soddenguru/the-mathematical-properties-of-the-enneagram-part-two</guid><category><![CDATA[enneagram]]></category><dc:creator><![CDATA[soddenguru]]></dc:creator><pubDate>Tue, 16 Oct 2018 01:32:03 GMT</pubDate><enclosure url="https://images.ecency.com/p/qjrE4yyfw5pEPvDbJDzhdNXM7mjt1tbr2kM3X28F6SraZkSYuE5PsyYadW9Cqaqn4skesLqTp2Vv411yYXnWe4CTxMcQNTMFuJie1gt4GT7XDebR7ijbRsJe?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[The Mathematical Properties Of The Enneagram]]></title><link>http://direct.ecency.com/enneagram/@soddenguru/the-mathematical-properties-of-the-enneagram</link><guid isPermaLink="true">http://direct.ecency.com/enneagram/@soddenguru/the-mathematical-properties-of-the-enneagram</guid><category><![CDATA[enneagram]]></category><dc:creator><![CDATA[soddenguru]]></dc:creator><pubDate>Tue, 16 Oct 2018 01:25:51 GMT</pubDate><enclosure url="https://images.ecency.com/p/2r8F9rTBenJQfQgENfxADE6EVYabczqmSF5KeWefV5WL9WAehwCXDkNuiCc6t1JBcqWEiJGACb8sQXh43Uj6tgCM6XZ5vaMwrQ9yDvhXRyrgpfWPF31SnQEBy3WK4wHqg?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[Pythagorean Triples]]></title><description><![CDATA[How to generate all Pythagorean triples? Read this article to find out!]]></description><link>http://direct.ecency.com/math/@stzheng/pythagorean-triples</link><guid isPermaLink="true">http://direct.ecency.com/math/@stzheng/pythagorean-triples</guid><category><![CDATA[math]]></category><dc:creator><![CDATA[stzheng]]></dc:creator><pubDate>Sat, 25 Aug 2018 19:56:45 GMT</pubDate><enclosure url="https://images.ecency.com/p/EEEoA8oLaAxsTkPYAARp78o5cJA1o6Chv9x98TzCFT6v5GbVLGixKnMdAZ92xzf2dJL2pwuB3aXLheBt9UaodzdHn4J7omgQnS4uWZAgVRoA2hGuea8swKSsgxFovpRNx1ymPRdMjbgrFVniVNpbp?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[Smartass answers to number theory programming problems]]></title><description><![CDATA[Over on Quora, I answered the question "What is a program in Java to check whether a number is a sum-product number?" The correct answer, in my opinion, is the following: public static boolean]]></description><link>http://direct.ecency.com/steemstem/@markgritter/smartass-answers-to-number-theory-programming-problems</link><guid isPermaLink="true">http://direct.ecency.com/steemstem/@markgritter/smartass-answers-to-number-theory-programming-problems</guid><category><![CDATA[steemstem]]></category><dc:creator><![CDATA[markgritter]]></dc:creator><pubDate>Mon, 06 Aug 2018 19:38:18 GMT</pubDate></item><item><title><![CDATA[The Winds of War]]></title><link>http://direct.ecency.com/maths/@roosterred/the-winds-of-war</link><guid isPermaLink="true">http://direct.ecency.com/maths/@roosterred/the-winds-of-war</guid><category><![CDATA[maths]]></category><dc:creator><![CDATA[roosterred]]></dc:creator><pubDate>Mon, 16 Jul 2018 10:01:18 GMT</pubDate><enclosure url="https://images.ecency.com/p/cyxkEVqiiLy2ofdgrJNxeZC3WCHPBwR7MjUDzY4kBNr81KcXjuWeLT9RXPqFTafoqXWX551eidjV7i8YhcZqUrsr5ntdfCBzmTPPt5KXEcBwHNMEZ6FWKiJkxVCG8HwHfJN?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[Digit Sum Sequences]]></title><description><![CDATA[A daily puzzle from @mathematrix has as its solution a "digit sum sequence": each new term is created by adding the sum of digits of the previous number. So, for example, starting from 1 we get]]></description><link>http://direct.ecency.com/math/@markgritter/digit-sum-sequences</link><guid isPermaLink="true">http://direct.ecency.com/math/@markgritter/digit-sum-sequences</guid><category><![CDATA[math]]></category><dc:creator><![CDATA[markgritter]]></dc:creator><pubDate>Tue, 19 Jun 2018 16:47:39 GMT</pubDate></item><item><title><![CDATA[NM]]></title><description><![CDATA[trash]]></description><link>http://direct.ecency.com/numbertheory/@roosterred/number-theory-a-begining</link><guid isPermaLink="true">http://direct.ecency.com/numbertheory/@roosterred/number-theory-a-begining</guid><category><![CDATA[numbertheory]]></category><dc:creator><![CDATA[roosterred]]></dc:creator><pubDate>Tue, 19 Jun 2018 09:14:45 GMT</pubDate></item><item><title><![CDATA[Proof there are an infinite number of prime numbers]]></title><description><![CDATA[Over 2000 years ago Euclid was possibly the first to give a proof that there are an infinite number of primes. A proof of this is actually very simple and fairly easy to understand. It is even often touted]]></description><link>http://direct.ecency.com/mathematics/@trev/proof-there-are-an-infinite-number-of-prime-numbers</link><guid isPermaLink="true">http://direct.ecency.com/mathematics/@trev/proof-there-are-an-infinite-number-of-prime-numbers</guid><category><![CDATA[mathematics]]></category><dc:creator><![CDATA[trev]]></dc:creator><pubDate>Sun, 28 Aug 2016 17:45:24 GMT</pubDate><enclosure url="https://images.ecency.com/p/5CEvyaAfMXebL91AaaysM1pEje67zhLTYsyH5YSGgh9s4tYSvg2P4RDcZFiS9ZhKL3METF2iCfKVg6S8N?format=match&amp;mode=fit" length="0" type="false"/></item></channel></rss>