ora exacta: 7:00:00; 8:00:00; 9:00:00; 10:00:00; 11:00:00.....
cestul defect:7:00:00; 7:59:55; 8:59:50; 9:59:45; 10:59:40....
de la 7 la 8⇒ cu 5 sec in urma
8-9⇒10 sec in urma
9-10⇒15 sec
10-11⇒20 sec
11-12⇒25 sec
12-13⇒30 sec
13-14⇒35 sec
14-15⇒40 sec
15-16⇒45 sec
16-17⇒50 sec
17-18⇒55 sec
18-19⇒ 1 minut
Deci de la 7 la 19 ceasul ramane in urma cu un minut.
Atunci cand ceasul indica ora 19:00:00 ora exacta este 19:01:00
