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Decoding Nazi Secrets: A Simple Cipher
complex ones. The key for a cipher used by Augustus Caesar, some 2,000 years ago, was simple enough: The receiver just had to shift the alphabet one position. In other words, "a" was represented by "b," "b" was represented by "c," and...
Caesar Cipher III
tab0 content Caesar Cipher III: Decode encrypted messages to determine the form for an affine cipher, and practice your reasoning and arithmetic skills. Input your guesses for the multiplier and constant. Caesar Cipher III is one of the Interacti...
Stock Exchange
Determine the value of two fractions you have chosen (which are represented as points on a number line). Then find a fraction whose value is between your two fractions (using an arrow on the number line as a guide) and determine its value. Bounded Fraction Pointer...
Project Interactivate - Tools
line, revolving around any line (which yields a 3-D image), rotations about any point, and translations in any direction. Related Topics: angles, calculus, coordinate, coordinate plane, coordinate system, flips, geometry, glides, graph, polygon, polyhedra, reflections, rotation, sym...
Project Interactivate: Lessons
Introduces students to modular (clock) arithmetic and how modular arithmetic can be used to encode messages using simple shift, multiple and affine ciphers. Grade Level: Grades 6-8, Grades 9-12 Related Topics: addition, affine cipher, arithmetic, ciph...
Expected Value
Introduces students to modular (clock) arithmetic and how modular arithmetic can be used to encode messages using simple shift, multiple and affine ciphers. Grade Level: Grades 6-8, Grades 9-12 Related Topics: addition, affine cipher, arithmetic, ciph...
Project Interactivate - Lessons
Introduces students to modular (clock) arithmetic and how modular arithmetic can be used to encode messages using simple shift, multiple and affine ciphers. Grade Level: Grades 6-8, Grades 9-12 Related Topics: addition, affine cipher, arithmetic, ciph...
Secrets, Lies and Atomic Spies: Decipher A Coded Message
decipher a message. Some ciphers have simple keys, others, complex ones. The key for a cipher used by Augustus Caesar, some 2,000 years ago, was simple enough: The receiver just had to shift the alphabet one position. In other words, "a" was represented by "...
Inventing the Future: Virtually Real
use at the cash machine, or the greeting card that plays music! Make a list and compare it with lists made by your classmates. Who can create the longest list? Identify how many items on your list use semiconductors. MODEL A NEURAL NETWORK Your loan has been denied --...
Nordic Sagas: Viking Ships
commemorate the anniversary, the Leif Ericson Society has organized the Leif Ericson Millennium. The international celebration begins on Leif Ericson Day, October 9, 1999, and continues for one year. The celebration will re-enact Leif Ericson's voyage to North America or "Vinland" ...
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