Skill 2 of 10 · Basic MathClose

Multiples and factors

Find least common multiples and greatest common factors.

  • The least common multiple of 3 and 5 is 15.
  • The greatest common factor of 12 and 30 is 6.

Question 1 of 4

Susan and Daphne walk a track together. Susan finishes a lap in 4 minutes, Daphne in 6 minutes. They start at the same time.

How many minutes until they complete a lap at the same time?

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