First in 4 group each 3 balls.(A, B, C, D ) ?1 I2 z5 B) _6 W
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: K9 X: E- s1 y% B) J
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.3 F9 @" y' X( g* \! a
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.2 h% x/ L/ [! V. Z% A# Z
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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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