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LCM(21, 7) = 21
33 divided by 5 is 6 remainder 3 OR 6 3/5 OR 6.6
3=3*1 7=7*1 21=3*7 LCM=(3*7)=(21*1)=21
The factors of 7 are 1 and 7. The factors of 21 are 1, 3, 7, and 21. The only numbers that are factors of BOTH 7 and 21 are 1 and 7.