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Grade: 10

                        

H.C.F of 3240,3600 and a third number is 36 and their L.C.M is 2^4x3^5x5^2x7^2.Find the third number.

6 years ago

Answers : (4)

Pallavi Das
17 Points
							H.C.F=36=2^2*3^2
L.C.M=2^4*3^5*5^2*7^2

3600=2^4*3^2*5^2
3240=2^2*3^4*5

Third no.= 2^2*3^2*7^2*3^3        
                =2^2*3^5*7^2
						
6 years ago
Aiman Saad Baig
39 Points
							HCF (3240, 3600, y) = 36
LCM (2^4x3^5x5^2x7^2) = 4846100
We know that; 
HCF X LCM = Product of the numbers
36 X 4846100 = 3240 X 3600 X y
174459600 = 11664000 X y
y = 174459600 / 11664000
y = FIND OUT ?
						
6 years ago
Akash Singh
11 Points
							3600=2^4*3^2*5^23240=2^2*3^4*5H.C.F =36=2^2 *3^2Since H.C.F is the product of lowest power of common Factor , so the third Number must have (2^2 *3^2) as it`s factor .Since L.C.M is the Product of Highest power of Common  Prime Factor , So the Third number must have 3^5 and 7^2 as it`s factor .Therefore , Third number =2^2*3^5*7^2
						
2 years ago
Kushagra Madhukar
askIITians Faculty
605 Points
							
Dear student,
Please find the attached solution to your problem below.

3600 = 24*32*52
3240 = 22*34*5
H.C.F = 36 = 22*32
Since H.C.F is the product of lowest power of common Factor , so the third Number must have(22*32) as it`s factor.
Since L.C.M is the Product of Highest power of Common  Prime Factor, So the Third
number must have 35 and 72 as it’s factor.
Therefore, Third number =22*35*72
 
Hope it helps.
Thanks and regards,
Kushagra
2 months ago
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