Mary has a bag of salt which weights 140 grams. She has only 2 measuring chips, one is 7 grams and the other is 2 grams. She wants to separate the bag of salt into 2 bags, one which has 55 grams and the other which has 85 grams. How can you help Mary out using the balance scale to measure just 3 times? It is not necessary to use the chips every time. Monday, November 22, 2010
Separate into 2 bags of sault
Mary has a bag of salt which weights 140 grams. She has only 2 measuring chips, one is 7 grams and the other is 2 grams. She wants to separate the bag of salt into 2 bags, one which has 55 grams and the other which has 85 grams. How can you help Mary out using the balance scale to measure just 3 times? It is not necessary to use the chips every time. 
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