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TEAS MathematicsTell them apart first

Factors, Multiples, GCF & LCMATI TEAS 7 cheat sheet

Tell them apart first

10 key facts Reviewed Oct 2026
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Definitions

  • A factor divides into the number evenly (small)
  • A multiple is the number times an integer (big)
  • Factors of 12: 1, 2, 3, 4, 6, 12

Gcf

  • Greatest Common Factor — largest factor they share
  • Use it to simplify fractions
  • GCF of 18 and 24 = 6

Lcm

  • Least Common Multiple — smallest multiple they share
  • Use it to find a common denominator
  • LCM of 4 and 6 = 12

Method

  • Prime factorization: GCF takes shared primes, LCM takes all primes at highest power
Key takeaway

Tell them apart first

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