The document discusses the minimum common multiple (MCM) and maximum common divisor (MCD) of two numbers. It provides examples of finding the MCM of 4 and 5, which is 20, and the MCD of 24 and 30, which is 6. To find the MCM, it lists the multiples of the two numbers and finds the smallest number that is a multiple of both. To find the MCD, it lists the divisors of the two numbers and finds the largest number that divides both.