Skip to content / Đến nội dung
ThichHocToan.com

2020 AMC 8 Question 12

AMC8 · 2020 AMC 8

Question 12

For a positive integer $n,$ the factorial notation $n!$ represents the product of the integers from $n$ to $1.$ For example:

$$
6! = 6 \times 5 \times 4 \times 3 \times 2 \times 1
$$

What value of $N$ satisfies the following equation?

$$
5! \times 9! = 12 \times N!
$$
  1. $10$
  2. $11$
  3. $12$
  4. $13$
  5. $14$