Attentiveness Test

Find on the table a sequence of pairs of blue and red numbers from 1 to 51

This is a test for attention and observation.
Find on the table a sequence of pairs of blue and red numbers from 1 to 51.

If you can find these numbers in:
5-10 minutes, you have excellent attention
10-15 minutes - good
15-20 minutes - average
20-25 minutes - satisfactory observation
When you find all the numbers click on the timer.