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The Least Common Multiple (LCM) for 42 70 84 is 420.The Greatest Common Factor (GCF) for 42 70 84 is 14.
The least common multiple is the smallest positive number that is a multiple of two or more numbers. 14: 14, 28, 42, 56, 70, 84, 98 49: 98 The least common multiple for 14 and 49 and is 98.
84
Start by factoring each of the numbers. 7=7 12=2x2x3 14=2x7 Remove the duplicated factors. 7 is duplicated between 7 and 14; so remove one 7. 2 is duplicated between 12 and 14; so remove one 2. Multiply together the remaining factors. 7x2x2x3=84 Answer: 84
The common factors of 63 and 84 are: 1, 3, 7, and 21