16 very expensive jewels(10 red ,3 green and 3 blue) were day and night under strict control by a robot which counts these jewels once every 15 seconds,the jewels were put on a table in a cross form as follows:
The 10 red jewels were in a straight line.(start position)..1,,2,,3,,4,,5,,6,,7,,8,,9,,10
From the jewel number (7) brunched the other 6 jewels,,3 green to the right and 3 blue to the left,to make a cross form.
The robot counts like this(it counts only ten jewels every time):
1-counts ten jewels in a straight line and gets back to ( start) position..i.e from number 1 to number 10.
2-( after 15 seconds),counts in staight line to the first junction ,turns to the right and continues counting to ten,then gets back to ( start) position.
3-(after 15 seconds),counts in a straight line to the first junction,turns left and continues counting to ten.
and so on.
if any change in the number of jewels ( more or less than ten) happened,the robot will give alarm and closses all the doors
( to reach any door you need at least 5 mintes ).
can anyone steal some of these jewels without letting the robot to notice any change?
If yes,,,Howmany jewels can you take home safely.