How can you tell when there are 1001 pickles under your bed with 24 letters?

To decipher this riddle, break it down into parts. The number 1001 can be read as "one zero zero one," which sounds like the Word "one" when spoken aloud. The Word "pickles" has 7 letters. When combined with the number 24, it suggests the 7th, 24th, and 1st letters of the alphabet, which spell out "G, X, and A." Therefore, the answer to the riddle is "When you find the letters G, X, and A under your bed."