x y

	31 03 2013

100....... 10.......30
81..........9.........27
49..........7 ........ 21
25......... x ........ y
həlli:

100=10*10 30=3*10
81= 9*9 27=3*9
49=7*7 21=3*7
25=x*x
x=5 y=3*5=15