HCF of two numbers a & b is b if a is divisible by b.
Here, 90 is divisible by 45 so HCF is 45.
Alternate Methods:
1-
Prime factorization of 45 = 3x3x5
Prime factorization of 90 = 2x3x3x5
From the factorization it is clear that GCF = 3x3x5 = 45
2-
Factors of 45 are 1, 3, 5, 9, 15 & 45.
Factors of 90 are 1, 2, 3, 5, 6, 9, 10, 15, 30, 45 & 90.
Common factors are 1, 3, 5, 9, 15 and 45 and the greatest common factor is 45.
Oh, dude, the Highest Common Factor (HCF) of 45 and 90 is like the largest number that divides both 45 and 90 evenly. So, you take the factors of each number - 45 is like 1, 3, 5, 9, 15, 45, and 90 is like 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90. The biggest number they both share is 45, so that's the HCF. Easy peasy!
The GCF is 30.
The GCF is 15.
To find the HCF you first need to break the numbers down into their prime factors. In this case we have: 30 = 2x3x5 45 = 3x3x5 The next step is to identify any common factors. In this case both numbers have 3 and 5 as prime factors. To find the HCF, multiply these together: 3x5 = 15. To get the LCM, multiply the numbers together then divide by the HCF: 30x45/15 = 90.
The hcf is 15.
9
The hcf of 45 and 40 is 5.
The HCF of 4 and 90 is 2.
The GCF is 18.
The GCF is 30.
HCF(160, 90) = 10.
The HCF is 1.
The GCF is 1.
The GCF is 15.
HCF(26, 45) = 1. The numbers are co-prime.
The GCF is 15.
gcf(75, 45, 90) = 15 Using prime factorization: 75 = 3 x 5² 45 = 3² x 5 90 = 2 x 3² x 5 hcf = 3 x 5 = 15
Factors of 24: 1,2,3,4,6,8,12 and 24. Factors of 90: 1,2,3,5,9,10,18,30,45 and 90. The HCF (highest common factor) is 3.