1. Da Vinci code Can you crack the complex code? complex code?

2. Fibonacci – Magic numbers in design Golden Ratio is φ (phi) φ = 1 + = 1.6180339 φ = ½(√5+1) = 1.62 (2dp) 1φ Every side in the pentagram is φ times another side.

3. Alpha-Numeric codes Line up your code strips and read off the letters a b c d e f g h i j k l m n o p q r s t u v w x y z a 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 z y x w v u t s r q p o n m l k j i h g f e d c b a a b c d e f g h i j k l m n o p q r s t u v w x y z 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 z y x w v u t s r q p o n m l k j i h g f e d c b a From the peach strip: bxpv zlab becomes easy code From the white strip: hdvb frgh becomes easy code be he a s If you have numbers, try direct substitution, a=1 e.g. 14 21 13 2 5 18 3 15 4 5 becomes number code x p

4. Fibonacci – Golden rectangle 13 8 5 3 2 1

5. Julius Caesar Code Your message must be an exact square number e.g. 9, 16, 25, 36, 49 etc Write down vertically, read back horizontally e.g. Fourth July Independence Day becomes: FhlecoJunneuuddDrleeatypny FhlecoJunneuuddDrleeatypny FhIec oJnne uuddD rleea typnyFourthJuly Indep enden ceDay

6. Ambigrams – rotational symmetry

7. Complex Alpha-Numeric codes Can’t break the code? Try using the letters in reverse order Try using the letters in reverse order Try combining more than 1 technique Try combining more than 1 technique Count the letters – might be Julius Caesar Count the letters – might be Julius Caesar Are all numbers between 1 & 26? Are all numbers between 1 & 26? Have they been shifted? Have they been shifted? Try a matrix method Try a matrix method123451ABCDE 2FGHIJ 3KLMNO 4PQRST 5UVWXYZ e.g. 13 35 14 15 becomes 1 3 C COD E O D E

8. Fibonacci – Magic numbers in nature

9. Ambigrams – rotational symmetry