Question

Solve : (i) Find the HCF of 84,
120, 138 using prime ​

Answer 1

The hcf is 6

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84 = 2² x 3 x 7

120 = 2³ x 3 x 5

138 = 2 x 3 x 23

H.C.F = 2 × 3 = 6

Answer 2

Step-by-step explanation:

The products of prime factors of given numbers are:

84=2²(3)(7)

120=2³(5)(3)

138=2(3)(23)

LCM=2³(3)(7)(5)(23)=1930

HCF=3(2)=6.