If pqr ≠ 0 and p-x = 1/q, q-y = 1/r , r-z = 1/p, what is the value of the product xyz ?

If Pex=Qe-x for all real values of x, which one of the following statements is true?

A palindrome is a word that reads the same forwards and backwards. In a game of words, a player has the following two plates painted with letters. From...