First in 4 group each 3 balls.(A, B, C, D )
5 ~# Y. V. z; e4 A# S5.39.217.77answert1)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.5.39.217.774 y7 d% r4 Q$ H0 _; M9 y d6 E* ^
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.
8 x7 g0 ]+ L3 r2 t5.39.217.77answert 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.
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發表於 2007-12-1 03:18 PM
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發表於 2007-12-2 01:42 PM
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