This is a brain training application called N-back task (Nback), which is like training working memory.
There are many other apps that perform N-back calculations, but we created this app because there were no apps that perform calculations by handwriting.
If you want to calculate 2 back, you can enter the answer of the two previous answers.
There are difficulty levels from 2 back to 9 back.
рмЧрмд рмЕрмкрмбрнЗрмЯрм░ рм╕рморнЯ
рмЕрмЧрм╖рнНрмЯ 20, 2023
рм╖рнНрмЯрнНрм░рм╛рмЯрнЗрмЬрнА