there are 6 keys and 6 locks. then number of combinations to be tried out to get the actual solution

• for first lock 6
  for second lock 5
  .
  .
  .
  for fifth lock 2
  for sixth lock 0
  so answer will be 6+5+4+3+2+0 = 20
• 13 years agoHelpfull: Yes(19) No(6)
• 1st lock 6.
  2----5combination
  3------4;;
  6!ans
  
• 13 years agoHelpfull: Yes(7) No(10)
• 20
  1st lock-- 6 keys
  2nd lock --5 keys
  3rd lock --4 keys
  4th lock --3 keys
  5th lock-- 2 keys
  6th lock--last key is left.so that is key is fixed with 6th lock
  so, 6+5+4+3+2+0=20
• 10 years agoHelpfull: Yes(4) No(1)