Here is a table for checking power of observation. Its name is "Amusive table".

Find and click sequentially all numbers from 1 to 90 on this table. If you would do it for:

Amusive table for checking power of observation online
Next number: 1

Game duration:

Results distribution9.3%18.9%31.4%25.4%10.1%4.9%9.318.931.425.410.14.9<55-1010-1515-2020-25>25010203040% of people
Orphus system