Expression : PQPPPPP, PPQPPPP, PPPQPPP, PPPPQPP, PPPPPQP, _______________. The pattern followed is that in each term there are combinations of 'P' and 'Q' (7 letters) and in each term, the position of Q is shifted one place to the right. Thus, in the missing term, Q will be at the end = PPPPPPQ