How do you find the LCM of 4,30?
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"A 5.00 L sample of helium at STP expands to 15.0 L. What is the new pressure on the gas?"
1 Answer
Dec 3, 2016
60
Explanation:
List down the prime factors of the numbers. Align any common prime factors
4 : 2 * 2 30 : 2 * 5 * 3
Align the factors common to the two
4 : 2 * 2 30 : 2 * 5 * 3
Bring down all the factors, but count factors common to both numbers once only
4 : 2 * 2
30 : 2 * 5 * 3
--------------------------
: 2 * 2 * 5 * 3
Get the resulting product
4 : 2 * 2
30 : 2 * 5 * 3
--------------------------
: 2 * 2 * 5 * 3 = 60
