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
Answer: Option
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:
78 comments Page 3 of 8.

Krishan kant said:   9 years ago
Why not 0.03?

Dheeraj Yadav said:   9 years ago
1.08-0.36=0.72.
0.90-0.36=0.54.
(0.72-0.54=0.18).

HAROON UR RASHID said:   8 years ago
Yes, we can write 0.9 as 0.90.
Because if we see other given values than after decimal there are two degrees.
Just for making terms we can write 0.9 as 0.90.

Amit Singh said:   8 years ago
In question, it is 0.9 so how in solution it could be .90? Please explain.

Shubham said:   8 years ago
Is it necessary to write .9 as 90/100 instead of 9/10 to get the right answer?

Pradeep said:   8 years ago
How to solve, The HCF of 108, 36, 9 is 18? Please explain.

Reshma said:   8 years ago
Given number 1.08,0.36& 0.9.

To remove the decimal multiply with 100
Then the no are 108, 36, 90
Hcf of these no
108=2*2*3*3*3
36=3*3*2*2
90=3*3*2*5.

Here the 2 is repeated in all no so 2 and 3*3 is also repeated. So the HCF is 3*3*2=18
Here the question is in decimal form so the answer must be also in decimal.
To remove the decimal we multiple with 100 so for the perfect answer divide with 100.
So, the answer is 18÷100=0.18.

Sahil gupta said:   8 years ago
What is the HCF of 108, 36, 9?

Jaspreet said:   6 years ago
If 0.9 will be 0.09 then.

Rishav said:   8 years ago
Well explained, Thanks @Damini.


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