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avatar+480 

No calc please

 Jun 8, 2019
 #1
avatar+101431 
+3

Not sure about this one...but....

 

We can weigh any positive integer amount  up to

 

7 grams with weights of 1, 2 , 4   grams

15 grams with weights of 1, 2, 4, 8 grams

.

.

.

63 grams with weights of 1, 2, 4, 8, 16, 32 grams

127 grams with weights of  1, 2, 4, 8, 16, 32 ,64  grams

 

So...7  weights

 

 

cool cool cool  

 Jun 8, 2019
edited by CPhill  Jun 8, 2019

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