First in 4 group each 3 balls.(A, B, C, D )6 l# b9 x! B' C4 v8 U
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.公仔箱論壇. N: C- ~" N, t8 ]2 J2 V9 A
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.公仔箱論壇! ]- ?8 P2 t- c& ~# s2 j
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.3 U: }3 h* z; H! A% V9 |2 l
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