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You are watching: How many total gifts in the 12 days of christmas

Posted December 22, 2014 by Presh Talwalkar. Read around me, or email me.


The track “The Twelve job of Christmas” is a carol where the variety of gifts keeps raising cumulatively every day. Top top the Nth day, the recipient it s okay N gifts, add to the number of gifts given on each previous days.

How numerous gifts are given in all for the 12 days? What’s a general formula?

So the formula is N(N+1)(N+2)/6.

For N=12, the result is 364 gifts–which is ironically one gift for every day of the year not included Christmas.


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PRESH TALWALKAR

I run the historicsweetsballroom.com channel ~ above YouTube, which has actually over 1 million subscribers and 200 million views. Ns am additionally the author of The joy of game Theory: An introduction to strategic Thinking, and also several other publications which are obtainable on Amazon.

(As you can expect, the web links for my publications go to your listings on Amazon. Together an Amazon Associate i earn from qualifying purchases. This walk not impact the price girlfriend pay.)

By method of history, I started the Mind her Decisions blog back in 2007 come share a little bit of math, personal finance, personal thoughts, and game theory. It"s been rather a journey! I give thanks to everyone that has shared mine work, and also I am very grateful because that coverage in the press, including the Shorty Awards, The Telegraph, Freakonomics, and also many other well-known outlets.

I studied Economics and also Mathematics in ~ Stanford University.

People regularly ask just how I do the videos. Like many YouTubers i use renowned software to prepare mine videos. You have the right to search for computer animation software tutorials ~ above YouTube to learn how to do videos. It is in prepared--animation is time consuming and software deserve to be expensive!

Feel totally free to send me an e-mail . I obtain so plenty of emails the I might not reply, but I conserve all suggestions for puzzles/video topics.


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Book ratings space from June 2021.

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Mind your Decisions is a compilation that 5 books:

(1) The happiness of video game Theory: An development to strategic Thinking (2) 40 Paradoxes in Logic, Probability, and also Game concept (3) The Irrationality Illusion: how To make Smart Decisions and Overcome bias (4) The finest Mental math Tricks (5) Multiply number By drawing Lines
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The pleasure of video game Theory shows exactly how you deserve to use mathematics to out-think your competition. (rated 4.2/5 stars ~ above 200 reviews)

40 Paradoxes in Logic, Probability, and Game Theory consists of thought-provoking and counter-intuitive results. (rated 4.1/5 stars ~ above 30 reviews)

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The Irrationality Illusion: how To make Smart Decisions and also Overcome Bias is a handbook that defines the numerous ways we are biased about decision-making and also offers approaches to make smart decisions. (rated 4/5 stars on 17 reviews)

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The ideal Mental math Tricks teaches exactly how you can look like a math genius by solving problems in your head (rated 4.2/5 stars ~ above 57 reviews)

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Multiply number By illustration Lines This publication is a reference overview for my video that has over 1 million views on a geometric an approach to main point numbers. (rated 4.1/5 stars on 23 reviews)

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Mind her Puzzles is a arsenal of the three "Math Puzzles" books, quantities 1, 2, and also 3. The puzzles topics include the mathematical subjects consisting of geometry, probability, logic, and also game theory.

Math Puzzles Volume 1 features classic mind teasers and also riddles with complete solutions for troubles in counting, geometry, probability, and also game theory. Volume 1 is rated 4.4/5 stars top top 75 reviews.

Math Puzzles Volume 2 is a sequel book with more great problems. (rated 4.3/5 stars on 21 reviews)

Math Puzzles Volume 3 is the third in the series. (rated 4.3/5 stars top top 17 reviews)

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Teachers and also students roughly the human being often email me about the books. Due to the fact that education have the right to have together a huge impact, I shot to do the ebooks easily accessible as commonly as feasible at together low a price together possible.

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