How good are you at mental arithmetic?

but it's 28 tho

honestly no it'll take me a good 15 to 20 seconds

yeah lol

although im definitely way slower than back in school days, this example was way too simple

As my Maths teacher once said I have no mathematical ability and that's true.

I think so

Up to 5-6 digits~
I had to undergo some helicopter tutoring as a young'in.