1) V 49 = 7 2) V 112 = V ( 2 * 2 * 2* 7) = 2 V 14 3) V 250 = 5 V 10 =========================== ( 7 * 2 V 14 ) / (5 V 10) = ( 14 V 14 ) / ( 5 V 10 ) = 2.8 V ( 1.4 )