Q. What is the least common multiple of 4 and 10 ?lcm(4,10)=
List Prime Factors: To find the least common multiple (LCM) of 4 and 10, we first need to list the prime factors of each number.The prime factors of 4 are 2×2.The prime factors of 10 are 2×5.
Identify Highest Powers: Next, we identify the unique prime factors from both numbers and the highest power of each prime factor that appears in the factorization of either number.For 4, the highest power of 2 is 22.For 10, the highest power of 2 is 21 and the highest power of 5 is 51.
Calculate LCM: Now, we multiply the highest powers of all the prime factors to find the LCM.LCM(4, 10) = 22×51LCM(4, 10) = 4×5LCM(4, 10) = 20