How many possible words can be created from the letters R, A, N, D (with repetition)?
We are given 4 distinct letters: R, A, N, D. We need to find how many distinct 4-letter words can be formed without repeating any letter.
This is a permutation of 4 unique letters: $4! = 4 \times 3 \times 2 \times 1 = 24$.
Each arrangement is considered a unique word, even if it doesn't have meaning in English.
Thus, the correct answer is: \[ \boxed{24} \]





The Art Institute of Chicago has recreated the famous painting "the bedroom" by Vincent van Gogh.
Carefully observe the image which will disappear after 30 seconds and answer the two following questions. The image cannot be viewed again.
