In the Soviet Union there was a table for observation. Its name is "Entertaining table. < br/> Find on this table, the numbers from 1 to 90, inclusive. < br/> If you can find these numbers: < br/> For 5-10 min, then you have the exceptional powers of observation. < br/> For 10-15 minutes is good. < br/> For 15-20 minutes is average. < br/> For 20-25 minutes is satisfactory.