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There are six suspects "Siva", "Durga", "Ekagra", "Naman", "Aniket" and "Manish". Amartya has written the murderer name in secretly in his diary in a mysterious way as "DVVPQ". Police were unable to solve the mystery so they called Dipjyoti. After a minute, Dipjyoti was able to decipher the cipher and ask the police to capture the murderer. Who is the murderer?

Just have no clue!(Question from technothlon mock)

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    $\begingroup$ Is this taken from the same source as your previous puzzle? If so, you need to cite it. $\endgroup$
    – F1Krazy
    Mar 14, 2018 at 9:38

1 Answer 1

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the murderer is

Durga

because

the cypher is obtained after a ROT(n-1)² with n the letter's position in the name
d ROT (1-1)² = d ROT 0 = d
u ROT (2-1)² is u ROT 1 = v
r ROT(3-1)² is r ROT 4 = v
g ROT (4-1)² is g ROT 9 = p
a ROT (5-1)² is a ROT 16 = q

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