And that difference is not a difference of language?

I have a good memory, but when come to memory, language doesn't make any difference.

If you want to try, give any your collegue a 12 digit number, allow them to repeat it one, then take it away, see how many can remeber.

The shorter you can say it, the easier you rember it.

You can also try this, say in English, $123,625,485.44 add $456,425,412.55, less $568,208,125,25, multiply by $452,251, then less ...

See how many ppl can follow.