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A is father of C and D is so...

A is father of C and D is son of B. E is brother of A. If C is sister of D, how is B related to E?

Correct answers: 1198

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Ferdinand Gotthold Max Eisenstein

Born 16 Apr 1823; died 11 Oct 1852 at age 29. German mathematician whose work covered a range of topics including the theory of elliptic functions, and quadratic and cubic forms, which led to cyclotomy, the reciprocity theorem for cubic residues, and also theorems for quadratic and biquadratic residues from partition of prime numbers.«

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