The 7 wishes for 7 brothers are the 7 brides they found in the 1953 movie musical. On the other hand the 7 greatest unsolved mathematical problems are the followings: (1) The Riemann Hypothesis, (2) Yang-Mills theory and the Mass Gap Hypothesis, (3) The P vs. NP problem, (4) The Navier-Stokes equations, (5) The Poincare conjecture, (6) The Birch and Swinnerton-Dyer conjecture, and (7) The Hodge conjecture. Each carries a prize of $1 million for the true solutions.