# Category: Challenge

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## The Kingdom of BuzzCity

A new mathematical challenge from Sonya Once upon a time, in the distant past, BuzzCity was a kingdom in which Sonya’s ancestor was the queen, or that’s what she likes […]

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## Numerical Logic

The first challenge of the year! Sonya is celebrating the new year by challenging you with a math puzzle that she knows how to solve! Can you find the two […]

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## O Christmas Tree!

Challenge your family with Sonya’s new puzzle Sonya knows that digesting the Christmas meal can leave you a little numb. So to keep the entire family awake until the end […]

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## Street Art

Sonya’s new puzzle Did you know that Sonya is a fan of street art? She has also decorated her home with mathematical graffiti, and of course it includes a small […]

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## The Mess

Start the month with one of Sonya’s puzzles Sonya was having some beams of wood delivered to build her new chalet. But all of a sudden… crash! The beams fell […]

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## A Pair of Monsters

A Halloween special challenge An army of little monsters are at the gates of BuzzCity, ready to sweep the streets of our beautiful city in search of candies. With the […]

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## The Mystery Triangle

Sonya puts your brain to the test! Sonya wants to check if you are ready for the end of year exams and has given you a new challenge! Place the […]

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## Find the missing number

Start the month off on the right foot with one of Sonya’s challenges! For Sonya’s early May challenge, find the number that replaces the question mark. Did you find it? […]

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## Like a fish trying to go with the flow

April challenge Here is Sonya’s April challenge for you! A fish is swimming against the current. Move only 3 of the 8 matches to make it swim in the opposite […]

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## Only one match away from the answer!

The last brain teaser of the month For this last brain teaser of the month, Sonya challenges you to find the number “5” by moving only one match stick. You […]

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## Optical illusion

Sonya has dreamed up a new brain teaser! Ready? Sonya has another challenging puzzle for you this month. Can you tell which of the two is greater: the total area […]

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## An ace behind the wheel

A new challenge to jumpstart the month of March! Not only is Sonya great at creating puzzles, she is also an outstanding driver. Today, she challenges you to find the […]

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## Love is in the air!

A hearty challenge Sonya was in a romantic mood when she created this special Valentine’s Day puzzle. Match each item with a number to solve the riddle. The solutions to […]

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## Figures and letters

Let’s start the month with Sony’s latest puzzle! Did you solve Sonya’s previous challenges?  Well, there is another one! It’s your turn! To see the solution, click here.

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## Bears & Fishes

Sonya comes back Sonya comes back in great shape in 2016 and offers you the year’s first challenge to take up with your students! Will you find out the exact […]

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## 2015 end of year challenge

From Sonya, with love. To celebrate this 2015 end of the year, Sonya offers you a new challenge, for you and your students – don’t forget to share it with […]