# Aptitude - Problems on H.C.F and L.C.M - Discussion

Discussion Forum : Problems on H.C.F and L.C.M - General Questions (Q.No. 8)
8.
The G.C.D. of 1.08, 0.36 and 0.9 is:
0.03
0.9
0.18
0.108
Explanation:

Given numbers are 1.08, 0.36 and 0.90.   H.C.F. of 108, 36 and 90 is 18,

H.C.F. of given numbers = 0.18.

Discussion:
74 comments Page 1 of 8.

Vinay kumar reddy said:   1 year ago
0.9 value is greater than 0.18 and it is a common divisor for 1.08, 0.36 and 0.9.
So, the answer should be 0.9 right?
(12)

Jijuu said:   1 year ago
GCD (Greatest Common Divisor) is just another term for HCF.

Just turn the given numbers 1.08, 0.36, 0.9 into 108/100, 36/100, 90/100
And find the HCF of 108, 36, 90 which is equal to 18.
And divide this answer 18 by 100,
We get 0.18.
(15)

Jeevan kumar vanum said:   2 years ago
Firstly, do subtraction from the first two numbers (108 - 36 = 72) .
Next, do subtraction of next two numbers(36-90=54)"- sign have no value".
next, subtract first and last numbers(108-90).

Then, subtrac the first Answers(72 - 52 = 18).

(6)

NandiniSidharth said:   2 years ago
@All.

Here we want to know if 0.9 is the HCF or 0.18 is.

I think both the numbers are found to be factors of 0.9, 1.08 and 0.36. But since we need the HCF (Highest common factor), the highest value among them should be 0.9 between 0.9 and 0.18.

Hence I think 0.9 is the highest common factor of 0.9, 1.08 and 0.36.

(2)

Omprakash said:   2 years ago
(1)

Viijay said:   3 years ago
Convert them into fractions:

i.e:108/100,36/100,90/100.
HCF of fractions: HCF of numerator/LCM of denominator;
HCF(108,36,90)/LCM(100,100,100),
= 18/100,
= 0.18.

(9)

DEV NANDAN said:   3 years ago
Multiplay theses all numbers.

(1.80, 0.36,0.9)by 100. It Will reduce your risk!

So we got 108 , 36 , 90.

Then find the GCD (HCF).

HCF of these three = 18.

Divide 18 by 100 (at first we multiplied by 100).
18Ã·100= 0.18.

Hope you understood.
(2)

Pinky said:   3 years ago
How did you get HCF as 18? please explain.
(4)

D.Kamal said:   4 years ago
How did you get HCF as 18? please explain.
(1)

Keerthi said:   4 years ago
Why we won't do the lcm for denominators, According to the formula? Please anyone explain.