30 Seconds Brain Trainer presents you a Simple Brain Training Exercise for 30 seconds. It requires no complicated calculations, no special educational backgrounds, no general knowledge except Adding two numbers. The challenge is doing the simple math as many times as possible in a fixed short time, which is 30 Seconds.
No irritating Ads, pop-ups or promotional offers.
![Relaxing Singing bowl, Forest Sounds Yoga music [60minute/30 Second Interval Timer] screenshot 3](https://i.ytimg.com/vi/OhObHEu7VuA/mqdefault.jpg)
9Apps 4.9
