When we have more than two numbers, the formula- product of two numbers=HCF* LCM doesn’t work. How can we find the third number when we know HCF, LCM of three numbers and Two numbers, Following the above approach? Or could you suggest a better o…
When we have more than two numbers, the formula- product of two numbers=HCF* LCM doesn't work.
How can we find the third number when we know HCF, LCM of three numbers and Two numbers, Following the above approach? Or could you suggest a better one.?
while solving one problem i faced issue with this LCM formula
LCM of fractions = LCM of numerators / HCF of denominators
Method1 :
I was to find LCM of 1.2 and 2.
1.2 = (12/10)
2=(2/1)
LCM of [(12/10),(2/1)]=[LCM of (12,2)]/[HCF of(10,1)]
LCM of (12,2) = LCM of [{(2^2)*3},2]/[HCF of(2*5,1)]
But
LCM of [{(2^2)*3},2]=(2^2)*3 =12
[HCF of(2*5,1)]=1
therefore,
LCM of (1.2,2)=12/1 = 12 (which is wrong)
Method2 :
1.2 = (12/10)
2=(12/6)
LCM of [(12/10),(12/6)]=[LCM of (12,12)]/[HCF of(10,6)]
But
LCM of [12,12]=12
[HCF of(10,6)]=HCF of(2*5,2*3)=2
LCM of (1.2,2)=12/2 = 6 (which is correct)
But I did not get what wrong am I doing in Method 1 ?