AMVENDOR HAS 3 STONES EACH MEASURING MASSES OF 2KG, 5KG AND 6 KG. HE HAS TO MEASURE 1KG 3KG 4KG AND 7KG USING ABOVE STONES. HOW

For measuring 1 KG...

If he wants to measure 1 kg, then he can keep the 5kg weight on the left side and the 6kg weight on the right side, thus making an effective weight of 1 kg..

Similarly,

For measuring 3 kg,

2 kg on left side and 5 kg on right side

For measuring 4 kg,

2 kg on the left side and 6kg on the right side

For measuring 7 kg,

keeping 5kg and 2 kg stones on the right side....

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