Question

Can two positive numbers have 812 and 28 as their hcf and lcm

Answer 1

Since 28 is a divisor of 812=29×7×4, such numbers exist. In this case as 29 is a prime, the only possibilities are 812 and 28.

P.S. The question is wrongly framed. 28 should be the HCF and 812 should be the LCM.