How many number of weights do u need to weigh 31 kg of rice if u have only one 1kg weights stone ?
a. 30. b. 31. c.5. d.4.

• Ans C (Five Weights)
  
  Weights are 1,2,4,8,16
• 12 years agoHelpfull: Yes(9) No(5)
• plz explain in detail
  
• 10 years agoHelpfull: Yes(1) No(2)
• first measure 1kg rice by 1 kg weight
  then use this 2kg (1kg rice+ 1 kg weight) to measure 2kg rice
  
  now combine this to get 3kg rice + 1 kg weight to measure 4 kg rice
  
  add this newly measure 4kg + 3kg + 1kg weight to measure 8 kg
  
  add this 8kg+ 4kg + 3kg + 1kg weight to measure 16 kg rice
  
  now combining all u get 31 kg rice + 1 kg weight
  
  so the answer is c. 5
• 8 years agoHelpfull: Yes(1) No(0)