find the hcf of the following number by prime factorisation method 75 and 90
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Answered by
0
Answer:
75 = 3 × 52;
75 is not a prime, is a composite number;
90 = 2 × 32 × 5;
90 is not a prime, is a composite number;
Answered by
1
Answer:
The gcf of 75 and 90 can be obtained like this:
The factors of 75 are 75, 25, 15, 5, 3, 1.
The factors of 90 are 90, 45, 30, 18, 15, 10, 9, 6, 5, 3, 2, 1.
The common factors of 75 and 90 are 15, 5, 3, 1, intersecting the two sets above.
In the intersection factors of 75 ∩ factors of 90 the greatest element is 15.
Therefore, the greatest common factor of 75 and 90 is 15.
Step-by-step explanation:
Hope it helps u
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