You have only 1 kg weight. You have to weight 31kg. Min number of measurements you have to done ?	Choose the correct option:
A) 21R  B) 33R  C) 35R  D) 31R  E) 38R
You can do it in 5 steps.   1,2,4,8,16   Asume stone as S (Left Side) weight of 1kg as T (Right Side)   Move 1T to the same side as S and, Left Side is S+1T, Now weight 2T   Move 2T to the same side as S and, against S+3T, Now weight 4T   Move 4T to the same side as S and, against S+7T, weight 8T   Move 8T to the same side as S and, against S+15T, weight on right Side is 16T   15R + 16R = 31R.   ANSWER:31R 15  + 16= 
<gadget id="calculator"> 15  + 16</gadget>
<output>31</output>
31R.   ANSWER:31R
<result>D</result>
You have only 1 kg weight. You have to weight 31kg. Min number of measurements you have to done ?