Question

Find the largest prime factor of 18! + 19! + 20!.

Answer 1

Answer:

23 is the answer

Step-by-step explanation:

So, 23 is the largest prime number on the list. Let's calculate the factors of 20 and 18. So, numbers 20 and 18 have 2 common factors. Since 23 is the largest prime number in the list, it has the largest prime factor, i.e., 23.