if the LCM of first 20 natural numbers is X, then what will be the LCM of first 25 natral numbers

Answer 1

since 23 is prime, it will be at least X*23
Since 25 = 5^2, the value will be X*23*5
because no other n<25 has 5 as a factor twice

All the factors of 21,22,24 are already in X

Answer 2

You idiot