## Calculator Technique for Clock Problems in Algebra

The following models of CASIO calculator may work with these methods: fx-570ES, fx-570ES Plus, fx-115ES, fx-115ES Plus, fx-991ES, and fx-991ES Plus.

Before we go to Calculator technique, let us first understand the movements of the hands of our continuously driven clock.

For simplicity, let "dial" be the unit of one hand movement and there are 60 dials in the complete circle as shown in the figure.