Therefore, the GCF of 21 and 84 is 21. In summary, the answer to the question “What is the LCM and GCF of 21 and 84?” is 84 and 21.

Prime factorization of 84 is 2 × 2 × 3 × 7. Prime factorization of 90 is 2 × 3 × 3 × 5. Common factors = 2, 3. HCF of 84 and 90 is the product of the prime factors that are common to each of the given numbers. HCF of 84 and 90 is 6.

We can see that 24 and 84 have 2 x 2 x 3 in common, therefore, 12 is the greatest common factor.

Factors of 21 (Twenty one) = 1, 3, 7and 21. Factors of 35 (Thirty five) = 1, 5, 7 and 35. Therefore, common factor of 21 (Twenty one) and 35 (Thirty five) = 1 and 7. Highest common factor (H.C.F) of 21 (Twenty one) and 35 (Thirty five) = 7.

What is the Greatest Common Factor of 18 and 72? Greatest common factor (GCF) of 18 and 72 is 18. We will now calculate the prime factors of 18 and 72, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 18 and 72.

Explanation: The LCM of 24 and 36 is the smallest positive integer that divides the numbers 24 and 36 without a remainder. If you just want to know what is the least common multiple of 24 and 36, it is 72.

72

12

360

180

Answer. 6 is the smallest common multiple of 36 which is a perfect square.

96

The HCF of 18 and 30 is equal to. >The HCF of 18 and 30 is equ…

The LCM of 15,30,18 15 , 30 , 18 is the result of multiplying all prime factors the greatest number of times they occur in either number. The LCM of 15,30,18 15 , 30 , 18 is 2⋅3⋅3⋅5=90 2 ⋅ 3 ⋅ 3 ⋅ 5 = 90 .

60

120

Answer: LCM of 20, 30 and 60 is 60 For 20, 30 and 60 the smallest number which would be perfectly divisible by them is their LCM which is 60.

10

150

35

144