Asked by Cons
Freddy and his friends write their names in code. Each friend's name is represented by a number. To identify the friend in a message, you must find the prime factorization of the number. Freddy gets a message from 45. Who is the message from.
Secret Code:
Freddy= 2x3x5
Judy= 2x2x3x7
Dan= 3x3x5
Camilla=2x3x5x5
Secret Code:
Freddy= 2x3x5
Judy= 2x2x3x7
Dan= 3x3x5
Camilla=2x3x5x5
Answers
Answered by
Kabir
=> First, you must note that the number given to you is 45. So, you must find its prime factorisation.
45 = 3 x 15
= 3 x 3 x 5
Since this is the same as the code for Dan, the message is from Dan.
45 = 3 x 15
= 3 x 3 x 5
Since this is the same as the code for Dan, the message is from Dan.
Answered by
Steve
If you find this interesting, read about Gödel encoding, where each letter is a prime factor raised to a power. The nth letter is the nth prime to the power of the letter's place in the alphabet. For example,
cat is represented by 2^3 * 3^1 * 5^20
You can see that the values get huge very fast, and decoding is quite difficult.
cat is represented by 2^3 * 3^1 * 5^20
You can see that the values get huge very fast, and decoding is quite difficult.
Answered by
MathMate
For practice: try decoding
14007996280973190758400000
14007996280973190758400000
Answered by
MathMate
I read the instructions wrong, the coded word should read:
3597206253997569964636384069705890201600000
3597206253997569964636384069705890201600000
Answered by
Steve
Thanks for the referral! :-)
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