Question

hcf of following.................

Answer 1

(1)136=2×2×2×17
170=2×5×17
255=3×5×17
HCF of 136,170 and 255=17

(2)513=3×3×3×19
783=3×3×3×29
HCF of 513,783=3×3×3=27

Answer 2

1.    by prime factorisation :
136 = 2*2*2*17
170 =2*5*17
255 = 3*5*17

common prime number = 17

so hcf = 17




2 .  by prime factorisation:
513 = 3*3*3*19
783 =3.*3*3*29

common prime number = 3*3*3

hcf  = 27

hope i helped you 
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