8. Find all the factors of 23.
10. What is the greatest factor of 28?
of 25?
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Answer:
8.
The factors of 23 are 1 and 23. Since 23 is a prime number, therefore, it has only two factors.
10.
to find the HCF of 28 and 25
The prime factorization of 28 is: 2 x 2 x 7.
The prime factorization of 25 is: 5 x 5.
The prime factors and multiplicities 28 and 25 have in common are: 1.
1 is the Hcf of 28 and 25.
Hcf(28,25) = 1.
Therefore, the greatest common factor of 28 and 25 is 1.
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