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11 August, 10:30

What is the LCD for 11/21 and 31/45?

A.) 945

B.) 315

C.) 66

D.) 105

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Answers (2)
  1. 11 August, 12:51
    0
    The LCD is the Least common multiple of 21 and 45, which is the product of the highest occurring primes of the numbers prime factorizations.

    21=3*7, 45=3*3*5 so the LCM of 21 and 45 is 3*3*5*7=315

    So the LCD is 315
  2. 11 August, 14:23
    0
    B) 315 is the LCD FOR 11/21 AND 31/45
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