Numeration
Section 2.4
| 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 the 'time' as a modular arithmetic conversion for the input number in the given base. The applet can be used for simple (2-digit) conversion of base ten numbers to other number systems by counting clock cycles. |
| Caesar Cipher | Students input parameters to create coded messages using an affine cipher. The affine cipher is based on a 26-digit (letter) number system. |
| Caesar Cipher II | Students determine the parameters for an affine cipher used by the applet to generate 'secret code' versions of student messages. The affine cipher is based on a 26-digit (letter) number system. |
| Caesar Cipher III | Students decode and determine parameters for an affine cipher message generated by the applet. The affine cipher is based on a 26-digit (letter) number system. |
