Clock Arithmetic

Section 4-4

Activity Name Activity Description
Clock Arithmetic Students use the applet to manually adjust the number of 'hours' that appear on a graphical clock face (representing a number system base) and then input a number of hours for the clock to count. The applet supplies a 'time' as a modular arithmetic conversion for the input number in the given base.
Caesar Cipher Students input parameters to create coded messages using an affine cipher. Students can also generate the code by hand using base 26 modular arithmetic.