The gcf of 54 and 81 is 27. Find the prime factorization of 54. 54 = 2 × 3 × 3 × 3. Find the prime factorization of 81. 81 = 3 × 3 × 3 × 3. To find the gcf, multiply all the prime factors common to both numbers: Therefore, GCF = 3 × 3 × 3. GCF = 27.
What is the greatest common factor of 18 and 54?
The factors of 18 are 1, 2, 3, 6, 9 and 18. The factors of 54 are 1, 2, 3, 6, 9, 18, 27 and 54. So, the Greatest Common Factor for these numbers is 18 because it divides all them without a remainder.
Which is the greatest common factor of 81?
The factors of 81 are 1, 3, 9, 27 and 81. So, the Greatest Common Factor for these numbers is 27 because it divides all them without a remainder. Read more about Common Factors below. To use the GCD / GCF / HCF Calculator below just enter a set of numbers separated by commas (,).
Which is the greatest factor of 27 54 81?
Each of the numbers can be divided by 1, 3, 9, and 27, so you can say that these numbers are common factors of the set of numbers 27, 54, and 81. The largest of the common factors is 27, so you can say that 27 is the greatest common factor of 27, 54, and 81. See the Factoring Calculator to learn more about finding the factors…
What is the HCF for 18 and 48?
(a) Given numbers are 18 and 48. Here, the common factors are 2 and 3. Hence, the HCF = 2 x 3 = 6. (b) The given numbers are 30 and 42. Here, the common factors are 2 and 3. Hence, the HCF = 2 x 3 = 6. (c) Given numbers are 18 and 60. Here, the common factors are 2 and 3. Hence, the HCF of 18 and 60 = 2 x 3 = 6.
What is the HCF for 36 and 84?
(e) Given numbers are 36 and 84. Here, the common factors are 2, 2 and 3. Hence, the HCF = 2 x 2 x 3 = 12. (f) Given numbers are 34 and 102.
What is the HCF for the number 91?
(h) Given numbers are 91, 112 and 49. Here, the common factor is 7. Hence, the HCF = 7. (i) Given numbers are 18, 54 and 81. Here, the common factor is 3 (occurring twice). Thus, the HCF = 3 x 3 = 9. (j) Given numbers are 12, 45 and 75. Here, the common factor is 3. Hence, the HCF = 3. Question 2. (a) numbers? (b) even numbers? (c) odd numbers?
