Q. What is the least common multiple of 8 and 10 ?lcm(8,10)=
Find Prime Factorization: To find the least common multiple (LCM) of 8 and 10, we first need to find the prime factorization of each number.The prime factorization of 8 is 23, since 8=2×2×2.The prime factorization of 10 is 2×5, since 10=2×5.
Identify Highest Powers: Next, we identify the highest powers of all the prime factors that appear in the factorization of both numbers.For the number 8, the highest power of 2 is 23.For the number 10, the highest power of 2 is 21 and the highest power of 5 is 51.
Calculate LCM: To find the LCM, we take the highest powers of all prime factors that appear in the factorization of both numbers.So, we take 23 from the number 8 and 51 from the number 10.Since there is no common factor of 5 in the prime factorization of 8, we only take the highest power of 5 from 10, which is 51.
Multiply Highest Powers: Now, we multiply these highest powers together to get the LCM.LCM(8, 10) = 23×51LCM(8, 10) = 8×5LCM(8, 10) = 40