ICSE Class 8 Answered

0.1 and 0.25

Converting 0.1 and 0.25 into like decimals, we get

0.10 and 0.25

Now, expressing these numbers without decimals as the product of primes,

10 = 2 x 5 

25 = 5 x 5 = 5²

Now, HCF of 10 and 25 = 5

Thus, HCF of 0.1 and 0.25 = 0.05 (taking 2 decimal places)