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At first glance it seems the missing number should start with 6 and then
continue with another 6 and then with an unknown digit. But in fact these
numbers are "coded" times 2:42, 3:48, 4:53 and 5:57. As it can be seen the
time step between them decreases by 1 minute - 66 minutes between the first
two times, 65 minutes between the second and the third one, and 64 minutes
between the third and the fourth one. Based on this pattern the last time
should be 63 minutes later than the preceding 5:57 and that makes precisely
7:00. |
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