The HCF of 22×32×52,24×34×53×11,2×32×52,24×34×53×11 is:
24×34×53×11
2×32×52
HCF (of above numbers) = Product of the smallest power of each common prime factor in the numbers
=21×32×52
=2×9×25=450
HCF of (23×32×5),(22×33×52) and (24×3×53×7) is
(a) 30 (b) 48 (c) 60 (d)105