Q. Rahul have 4 diffrnt weights A,B,C,D. By using pair of weights he made 6,8,10,14 and 16. Find the no of unique combination can be made by using those 4 weights?
a. 1
b. 2
c. 3
4. more than 3

• 1,5,7,9 and 2,4,6,10 so two combinations are possible
  
  
  as 2+4=6
  2+6=8
  4+6=10
  4+10=14
  6+10=16
  
  1,5,7,9
  1+5=6
  1+7=8
  1+9=10
  5+9=14
  7+9=16
• 8 years agoHelpfull: Yes(19) No(6)
• ans will be 3. Unique combinations are 1,5,7,9 ;2,4,6,10 and 2,4,6,12.
• 8 years agoHelpfull: Yes(13) No(1)
• 2
  let AB - 6; AC - 8; AD - 10;
  Now, If A is 1 then other 3 are 5,7,9
  if A is 2 then other are 4,6,8
  but we any other digit to A then the other weights are repeating.
  So, there is only 2 unique Combination.
• 8 years agoHelpfull: Yes(8) No(2)
• 1
  weight must be 1,5,7,9 only
  1+5=6
  1+7=8
  1+9=10
  5+9=14
  7+9=16
  but if we take weight as 2,4,6,8
  2+4=6
  2+6=8
  4+6=10
  or
  2+8=10
  6+8=14
  but getting 16 is not possible by pairing and sum .
  so finally only one combination is corrrect answer
  
• 8 years agoHelpfull: Yes(6) No(6)
• And : c
  1,5,7,9
  2,4,6,10
  2,4,6,12
• 8 years agoHelpfull: Yes(3) No(2)
• 2
  Weights are 1,5,7,9
  And 2,4,6,8....
  If u try to pair with other numbers you will have to use more than 4 weights but in question... U have only weights A,B, C and D
• 8 years agoHelpfull: Yes(2) No(12)
• priya don't know any thing
  
• 8 years agoHelpfull: Yes(1) No(0)
• Have any one got result of 21st Aug??
• 8 years agoHelpfull: Yes(0) No(2)
• still i m wating the result of 21st aug
• 8 years agoHelpfull: Yes(0) No(0)
• priya i have one question, why u are taken 1,5,7,,9 & 2,4,6,10 these two combinations plz explain
• 8 years agoHelpfull: Yes(0) No(0)
• THEY HAVE JUST ASKED FOR NO. OF UNIQUE COMBINATIONS.. SO IT CN BE JUST 4!=24
• 8 years agoHelpfull: Yes(0) No(1)
• science Rahul has 4 different wieght
  then total no of unique combination = 4c1+4c2+4c3+4c4 = 15
• 8 years agoHelpfull: Yes(0) No(1)
• First run:
  With 6 four pairings can be made.
  Second run:
  Eliminate 6 (to insure uniqueness)
  With 8 three pairings can be made
  Third run
  Eliminate 8
  With 10 two pairings can be made
  Fourth run
  Eliminate 10
  With 14 one pair can be made.
  
  4 + 3 + 2 + 1
• 8 years agoHelpfull: Yes(0) No(0)
• 2 , 4, 6 ,10
• 7 years agoHelpfull: Yes(0) No(0)