number puzzle

Consider a five-digit number PQRST that has distinct digits P, Q, R, S, and T, and satisfies the following conditions: P P > T R < T If integers 1 through 5 are used to construct s...

Each of the letters arranged as below represents a unique integer from 1 to 9. The letters are positioned in the figure such that (A x B x C), (B x G x E) and (D x E x F) are equal...

Each of the letters in the figure below represents a unique integer from 1 to 9. The letters are positioned in the figure such that each of (A+B+C), (C+D+E), (E+F+G) and (G+H+K) is...