Theory of Intelligence
11TH•Mathematics•Complex Numbers•Question 22

Solution

Encrypt the word "CLASS" by adding the complex encryption key $k=-3+4i$. Then decrypt it back to the original word.

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Solution

Use the mapping A=1,…,Z=26A=1,\dots,Z=26.

Word: CLASS

C=3, L=12, A=1, S=19, S=19C=3,\ L=12,\ A=1,\ S=19,\ S=19

Encryption key (addition):

k=−3+4ik=-3+4i

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