What word of five letters has only one left when two letters are removed?

Why this works

This riddle plays on the clever manipulation of the word "stone." The trick lies in the fact that when you remove the first two letters, "St," you are left with the word "one," which literally means a single unit or "only one." This creates a fun double meaning: while "stone" originally has five letters, the removal of two leads to a term that signifies singularity, aligning perfectly with the riddle’s question about having "only one left."