Question

Difference between lcm and hcf of 20 30 40

Answer 1

20=2×2×5
30=2×3×5
40=2×2×2×5
LCM = 2×2×2×3×5= 120
HCF = 2×5=10
Difference= 120- 10 = 110

Answer 2

hye

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lcm of 20,30 and 40 

=>prime factoristaion of 20 = 2*2*5

=>prime factoristaion of 30 = 2*3*5

=>prime factoristaion of 40 = 2*2*2*5

lcm = 2*2*2*5*3

         = 120

 hcf of 20 30 40

=>factors of 20 =1,2,4,5,10,20
                                        
=>factors of 30 = 1, 2, 3, 5, 6, 10, 15, 30

=> factors of  50 = 1, 2, 5, 10, 25, 50

=>10

difference = lcm -hcf

                    = 120 -10

                       =110


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hope it helps u....