First in 4 group each 3 balls.(A, B, C, D )tvb now,tvbnow,bttvb! j4 S+ z# C+ P* U4 v z# J( o
answert1)A and B 去稱, 如果重量相等. than A and C去稱,如果重量相等. D 份3個.D1 and D2去稱, 如果重量相等. D3重量異常.5.39.217.77:8898$ e. m: J0 W1 o& _3 V7 i
answert2)A and B去稱, 如果重量不相等. than A and C去稱,如果重量相等.B 份3個.B1 and B2去稱,如果重量相等. B3重量異常./ b& c1 O- s2 v# t
answert 3)A and B去稱, 如果重量不相等. than A and C去稱, 如果重量不相等. A 份3個. A1 and A2去稱,如果重量不相等.之前 you know the different by A , B and C 重或輕.4 d( c* s; {! w( z
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