This month, I can't resist myself to sing along the beautiful song - It's the most wonderful time of the year.

In the beginning of every month we, the moderators, come up with this newsletter to update the community about the highlights of the past month to assure you don't miss the new exciting features, enchanting problems & posts and to introduce you to the engaging members of the community helping it build through their valuable contributions. Have fun going through this newsletter and don't forget to leave your words in the comment box.

\[\large \mathbf{ NEW} \ \ \ \mathbf{ FEATURES } \ \ \ \mathbf{ TO } \ \ \ \mathbf{ BE } \ \ \ \mathbf{ EXCITED } \ \ \ \mathbf{ ABOUT } \]

The Brilliant community is going through awe-inspiring growth. Every time I met such new features on Brilliant, they sounded more astounding. Are you excited to know about those spotlights? Okay, here we go:

1.**Cover Images for Chapters**

Each chapter has been beautified with pretty images which intend to describe what's included in it. I'm pretty sure you would love all the coverings. You can cherish them all into the community and here as representatives I've a few of them:

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\(\quad \) \(\quad \)2.**Concept quizzes and Challenge quizzes**

When you click on

button in the chapters, you will get the concept quizzes created by the Brilliant staff and the challenge quizzes concluding problems by the community members like you. The quizzes look like:\(\quad \quad \quad \quad \quad \quad \quad \quad\)

\(\quad \quad \quad \quad \quad \quad \quad \quad \quad\)3.**Problems suggesting a wiki/concept quiz/challenge quiz**

A greater number of problems have been linked to the related wikis. If you feel the need to learn/upgrade the concepts before hitting any problem, then you can go the wiki, learn the concepts and thump the problem back. To execute this click on the

button located at the right side of the problem.If you need more practice to boost up your problem solving skills, then you can find the related problems in the quizzes which look like:

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\(\quad \quad \quad \quad \quad \quad\)\[ \large \mathbf{ FASCINATING } \ \ \ \mathbf{ AND } \ \ \ \mathbf{ INTRIGUING } \ \ \ \mathbf{ PROBLEMS } \]

The following list of the problems will entertain you through out this journey. Make sure you too entertain the problems! Tight your seat belt, here we drive you to the problems:

The Amazing Race: A highly engaging real life problem determined to test your logical thinking.

It is obviously true, right?: It may seem obvious to you but make sure you give it a second thought.

The Unstated Rule of Logarithms: A basic property of logarithm appealing to wonder why is it rarely mentioned in logarithmic properties?

LCM Misconception: It will blow off the misconceptions if you had any about LCM.

Logical Solutions: A cool cryptogram problem assuming you learnt ABCs well in childhood days.

The odd theoretical ant: An ant wandering here and there in search of what? No one knows, Do you?

Fractal Orthogonal Circles: It can be presumed as the most difficult problem of the past month, double daring you!

\[\large \mathbf{ NEW} \ \ \ \mathbf{ ACTIVE } \ \ \ \mathbf{ MEMBERS } \]

Brilliant is growing day by day and everyone, contributing to Brilliant in any form, is creditable for its marvelous growth. In the past month, like every other months, we have found new friends who are developing their potential and will emerge as the super duper community members in the coming days. Here are those who recently joined us in the intellectual journey of Brilliant:

\(\quad \quad \triangleright \) Atul Shivam \(\quad \quad \quad \quad \quad \quad \quad \quad \triangleright\) Johanz Piedad \(\quad \quad \quad \quad \quad \quad \quad \triangleright \) Brandon Monsen

\( \quad \quad \triangleright \) Aditya Kumar \(\quad \quad \quad \quad \quad \quad \quad \ \triangleright \) Brain Wang \(\quad \quad \quad \quad \quad \quad \quad \quad \triangleright \) Xiaoying Qin

\(\quad \quad \triangleright \) Shyambhu Mukherjee \(\quad \quad \quad \quad \triangleright \) Dela Torre

\[\large \mathbf{ THE } \ \ \ \mathbf{ POSTS } \ \ \ \mathbf{ COMMUNITY } \ \ \ \mathbf{ LOVED } \]

This section is about the posts which were highly appreciated by the whole community. Here is a fair opportunity for you to grab them:

1.**RMO Practice Board**

It is very exciting to have a practice board which targets excellence in RMO and consequently many other competitive exams. You can get post solutions to the problems in the comments, thereby enriching your skills and even have an opportunity to post your own problems and have fun discussing them. Here is the RMO Practice Board.

2.**Featured Member - Xuming Liang**

As an interesting fact, Brilliant is featuring different members of the community, so that you can get to know them better. For the twelfth issue, Xuming Liang has been featured. The most amusing fact about Xuming is that he recently published a paper in the *International Journal of Geometry*. To know more about him, land on Calvin's note: Featured member - Xuming Liang.

3.**Brilliant Integration Contest - Season 2**

The last year, Brilliant Integration Contest was conducted by Anastasiya Romanova. In the continuation of the same, Aditya Kumar organized its further sequel. The aims of the Integration contest are to improve skills in the computation of integrals, to learn from each other as much as possible, and of course to have fun. Everyone is invited to take part in the contest. Like many others, if you too want to get involved, then just hit the Brilliant Integration Contest - Season 2.

4.**Singapore Mathematical Olympiad 2015**

If you want to perceive the level of Singapore Mathematical Olympiad(SMO) 2015, Khang Nguyen Thanh has made a well off arrangement for you. Try his set SMO 2015 - Senior Section - Round 1 and have fun solving it.

\[\large \mathbf{ WHO } \ \ \ \mathbf{ TO } \ \ \ \mathbf{ FOLLOW } \]

Here's the most awaited WhoToFollow list inferring the dazzling members of the community. I'm pleased to introduce you to the wonderful people who are always there to help and build the community. Here are the names, in no particular order:

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Akhil Bansal \(\quad \quad \quad \quad \quad \quad\quad \quad \quad \) Akshat Sharda\(\quad \quad \quad \quad \quad \quad \)

Rohit Udaiwal \(\quad \quad \quad \quad \quad \quad\quad \quad \quad \) Swapnil DasBe sure to hit the

button to keep yourself updated with the amazing problems and notes posted by them.Last but not the least, if you want to meet up the community members, you can join slack channels to know each other, have discussions and you can join the wiki collaboration parties too. Have fun!

\[. \\ . \\ . \\ . \\ . \\ \vee \\ \text{Consider yourself as Escher.} \\ \text{How will you move up there?}\] |

Happy Merry Christmas to everyone in advance! Don't forget to learn, explore, and share with others. Thanks a lot!

*#Moderation*

## Comments

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TopNewestHappy Merry Christmas to everyone in advance. \(\Huge \ddot{\smile}\) – Surya Prakash · 1 year, 1 month ago

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– Agnishom Chattopadhyay · 1 year, 1 month ago

Actually, "Happy" and "Merry" just do not go together...Log in to reply

Congrats everyone to be featured in this Newsletter. Merry Christmas and Happy New Year for all, this is first for me in Brilliant ! – Anish Harsha · 1 year, 1 month ago

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– Rohit Udaiwal · 1 year, 1 month ago

'All-in-one comment':)!!Log in to reply

I'm in the "Who to follow list", I can't believe it! Thank you so much! – Swapnil Das · 1 year, 1 month ago

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@Sandeep Bhardwaj Look at the presentation of this note! Don't you think that it looks the best among all the previous newsletters? :P :) – Nihar Mahajan · 1 year, 1 month ago

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– Rohit Udaiwal · 1 year, 1 month ago

Yes the presentation is fantastic!Log in to reply

The presentation was much better earlier, but then I had to remove several latex and images for smooth loading of the page. Otherwise many people would jump out without even reading it. – Sandeep Bhardwaj · 1 year, 1 month ago

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@Swapnil Das – Harsh Shrivastava · 1 year, 1 month ago

Congrats!Log in to reply

– Swapnil Das · 1 year, 1 month ago

Thank you!Log in to reply

– Satyajit Ghosh · 1 year, 1 month ago

Congrats !Log in to reply

– Swapnil Das · 1 year, 1 month ago

Thanks!Log in to reply

@Sandeep Bhardwaj You gave me nice birthday gift :) – Swapnil Das · 1 year, 1 month ago

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A very happy birthday to you and always stay young and happy! – Sandeep Bhardwaj · 1 year, 1 month ago

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– Rohit Udaiwal · 1 year, 1 month ago

Happy b'day Swapnil :)Log in to reply

– Swapnil Das · 1 year, 1 month ago

Congrats for being in the who to follow list!Log in to reply

– Swapnil Das · 1 year, 1 month ago

Haha, it is in December 5. You did an advance booking, smart boy :PLog in to reply

– Rohit Udaiwal · 1 year, 1 month ago

Hahaha!Log in to reply

@rohit udaiwal – Harsh Shrivastava · 1 year, 1 month ago

Congrats !Log in to reply

– Rohit Udaiwal · 1 year, 1 month ago

Thanks!Log in to reply

Happy New Year to everyone in advance \(\ddot \smile \) – Sandeep Bhardwaj · 1 year, 1 month ago

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Congratulations @Akhil Bansal,@akshat sharda ,@rohit udaiwal,@swapnil das you all deserve to be in the list of who to follow 👍🏻👍🏻👍🏻 – Atul Shivam · 1 year, 1 month ago

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– Swapnil Das · 1 year, 1 month ago

Thanks bro!Log in to reply

Yeeaaaah! Now more people will participate in the contest! – Aditya Kumar · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

Wow! Congratulations Aditya!Log in to reply

– Aditya Kumar · 1 year, 1 month ago

Thanks :)Log in to reply

Congo for all those who got featured. @Rohit Udaiwal I first followed you and you were my first follower ever since I joined brilliant. Now you you would get tons of followers. Congo bro \(\huge\ddot\smile\) – Ashish Siva · 8 months, 2 weeks ago

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– Rohit Udaiwal · 8 months, 1 week ago

Really?I joined Brilliant back then in 2014!To be truthful,I really don't remember you being my first follower or I being your first:P. But I believe you,Thanks for being my first follower :)Log in to reply

– Ashish Siva · 8 months, 1 week ago

Nono i was not your first follower, but I first followed you , XDLog in to reply

– Sandeep Bhardwaj · 8 months, 1 week ago

hahah!Log in to reply

– Ashish Siva · 8 months, 1 week ago

\[\ddot\smile\]Log in to reply

Hey Escher! You're still there! Why ain't you heading up here? :P – Sandeep Bhardwaj · 1 year, 1 month ago

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– Karthik Venkata · 1 year ago

Coincidence, or reference to M.C.Escher ?Log in to reply