Mental arithmetic…
Some of us love it. Many of us would give a leg away to not deal with it again.

Brain Fever is the puzzle game where add, subtract, multiply and divide is fun. Clock will be ticking and your goal is to quickly reach the presented number using as many numbers as possible. The score depends on the calculation size: the more numbers you use, higher the score will be!

Logic and creativity walk side by side here – every time, everywhere –, exercising and teasing both sides of your brain! Your math teacher will believe you are suffering a kind of a genius mutation after experiencing the way you easily solve all the arithmetic calculations.

We promise you lots of fun, improved math skills and concentration power!
We demand intelligence!

Be careful! Some of our levels may cause you a BRAIN FEVER!

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// Option A //

To download BRAIN FEVER: Maths Challenge mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download BRAIN FEVER: Maths Challenge mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download BRAIN FEVER: Maths Challenge from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search BRAIN FEVER: Maths Challenge in HappyMod App.