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Find the least number of five digits which is exactly divisible by 12, 15 and 18?

Correct answer: B. 10080

  • A. 1080
  • B. 10080
  • C. 10025
  • D. 11080

Explanation

The LCM of 12, 15 and 18 is 180. The first five-digit multiple is 180 x 56 = 10080, because 180 x 55 = 9900 is still four digits. The likely mistake is option a, 1080, which is divisible by the given numbers but is not a five-digit number.

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