What is the least number which when doubled will be exactly divisible by 12, 14, 18 and 22 ?
A. 1286 B. 1436
C. 1216 D. 1386

• Answer is 1386.
  LCM of 12,14,18,22 is 2772. Since its not an option, we can divide it by 2 and see that it gives 1386.
  
  We are dividing it by two because its asked in the question that which number when doubled will be exactly divisible by 12, 14, 18 and 22.
• 8 years agoHelpfull: Yes(2) No(0)
• 1)The number which is divisible by 12,14,18,22.will be the answer.
  2)The number which is divisible by 12,14,18,22.That number must be divisible by 2,3,9,11,7.
  3)Go through the option,
  1286*2....which is not divisible by 3.
  1436*2...which is not divisible by 3.
  1216*2...which is not divisible by 3.
  1386*2 ..which is divisible by 2,3,9,7,11 .
  Hence,Option D)1386 (ans)
  
• 8 years agoHelpfull: Yes(0) No(1)