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In the Soviet Union there was a table for testing of observation. Its name is "Entertaining the table."





Look on the table sequentially numbers from 1 to 90 inclusive.
If you can find these numbers:
For 5-10 minutes, you have an exceptional observation.
For 10-15 minutes - good.
15-20 minutes - the average.
20-25 min - satisfactory.
attentiveness
Overview of the new large telescopes
Testing the connection between vision and perception of reality
The anecdote about how the three inductee to the appointment with the eye doctor went
Prisoners of war in the USSR
World Test Pattern
Without trade with the West? Well, we lived
10 simple exercises to restore vision
A separate power supply. Product compatibility table
The main myths about life in the USSR
Foreigners don't understand that! 16 signs that you were raised by immigrants from the USSR
...
Overview of the new large telescopes
...
Testing the connection between vision and perception of reality
...
The anecdote about how the three inductee to the appointment with the eye doctor went
...
Prisoners of war in the USSR
...
World Test Pattern
...
Without trade with the West? Well, we lived
...
10 simple exercises to restore vision
...
A separate power supply. Product compatibility table
...
The main myths about life in the USSR
...
Foreigners don't understand that! 16 signs that you were raised by immigrants from the USSR
 Time for children (GIFki-24shtuki)  Abandoned underground station in Moscow