SOLUTION: The GCF (greatest common factor) of 84 and another number, y, is 42. Their
LCM (least common multiple) is 252. Determine the value of y.
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Question 254470: The GCF (greatest common factor) of 84 and another number, y, is 42. Their
LCM (least common multiple) is 252. Determine the value of y.
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
given 84 has factors :2*2*3*7
gcf 42 has factors :2,3,7
lcm 252 has factors 2*2*3*3*7
given has only one 3 but lcm has 3*3
gcf says that 2 and 7 are in both
y=3*3*2*7
y=126
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