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# Category: Challenge

Challenge

## The Barista

A challenge that will really get those neurons firing! To get ready for a teaching day, what is your favorite drink: ☕❔ 🥛❔ ☕ ➕ 🥛 ❔Sonya challenges your students […]

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## The Marble Salesman

Help Sonya choose the bin with the right marbles. Are you ready to take up the challenge? Sonya faces a shady marble salesman. Only one of the bins contains real […]

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## Sonya and Friends

Let’s start the week with a little brain teaser! Sonya recently created a group for people who love math. The members are introducing themselves and shaking hands so that every […]

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## Sonya’s Machine

A new challenge in 6 levels! Sonya invented a machine that chooses a rule and applies it to all the numbers that we propose. Can you find the rule? Sonya […]

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## A Little Train Chugs Along

A new puzzle to solve! It has been a while since Sonya challenged you with one of her little puzzles. As the holiday season is coming, she decided to offer […]

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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 […]