5. 105min+2•17min= 105min+34min=139min
139min=2h 19min
17:25+ 2h 19 min= 19:44
odp. A
6. x- wiek syna
x•3- wiek ojca
x+x•3=4x
100=4x /:4
x=25
x•3= 75
odp. D
7. bok kwadratu= 25cm2:5=5cm
5cm+4cm=9cm
5cm-2cm=3cm
P=9cm•3cm=27cm2
27cm2-25cm2=2cm2
odp. A
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