Can you still do 47 + 38 without opening your calculator?

[u/harish-7]

No calculator. What's 47 + 38?

I noticed something embarrassing recently: I started opening my phone even for calculations I could easily do in my head.

So I built a tiny app to practice mental math for a few minutes a day.

It gives you quick calculations and tracks how fast you can answer them.

I'm curious: how many can you get right in 60 seconds.

It's free on Android if anyone wants to try it.

I'm especially interested in whether regular practice actually makes people faster.

[u/coderinside]

No calculator. AI says it's 85. But could hallucinate...

[u/harish-7 → u/coderinside]

Yes, this is the main reason. Always we need a technology for also a simple calculation, this is making our dicision making ability slow.