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* SM503M-2526PSA01 - Mathematics for Cryptography (INGE-1-INT, INGE-1-BN, INGE-1)

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In , solve the equation .

This equation has either no or several solutions.

If this equation has no solution, the answser is 'no solution'.

If this equation has several solutions, the answer is a list of integer numbers, separated with commas and no spaces. For example, the solution set for in is 4,11,18
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In calculate the inverse of .

The answer is an integer number between 0 et 30

If has no inverse, the expected answer is : "no inverse"
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How many divisors does the number 97200 have?

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To communicate between them, Anaïs and Bastien use an alphabet of only ten letters: 

a = 0, b = 1, c = 2, d = 3, e = 4, f = 5, g = 6, h = 7, i = 8, j = 9.

To encipher their messages, they decide to use the generalised Vigenère cipher on bigrams.

Bastien receives from Anaïs the ciphertext AAHF

Decipher the message knowing that the enciphering key is

A : 

 3  2 

 1  3 

B : 

 4 

 8 

Your answer will be a four letters word written in capital letters with no spaces.

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The affine ciphering system is used with the previously defined alphabet.

So, the used set is

The ciphering key is :

You have received the ciphered message : " ejomq? ".

Decipher this message, you should find an english word composed of 6 characters
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In , solve the equation .

This equation has either no or several solutions.

If this equation has no solution, the answser is 'no solution'.

If this equation has several solutions, the answer is a list of integer numbers, separated with commas and no spaces. For example, the solution set for in is 4,11,18
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In , solve the equation .

the answer is either an integer number between 0 et 37 or "no solution". 
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Give the list of all elements that have an inverse in

the answer is a list of values separates with commas, with no spaces

example : the list of invertible elements in is 1,3,7,9
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In calculate the inverse of .

The answer is an integer number between 0 et 25

If has no inverse, the expected answer is : "no inverse"
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what is the value of : ?
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