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What is the LCM of 20 and 980?

The lcm of 20 and 980 is 980.

Steps to find LCM

  1. Find the prime factorization of 20
    20 = 2 × 2 × 5
  2. Find the prime factorization of 980
    980 = 2 × 2 × 5 × 7 × 7
  3. Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:

    LCM = 2 × 2 × 5 × 7 × 7
  4. LCM = 980

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