Due to an error, the last column was a repeat of an earlier column. Here is the correct current column. The previous puzzle concerned a freight train traveling x times as fast as a passenger train. The freight train takes x times as long to pass the passenger train when going in the same direction as it does when they are going in opposite directions. The puzzle was to find the exact value of x. The answer is 1 + squareroot(2). Correct answers were received from Mike Harris and Helen Spivak. For a new puzzle suppose that a fourth degree polynomial, p(x), has the complex roots 1+i, 1-i, 2+i, and 2-i. Find the roots of the polynomial, h(x), that has the same coefficients as p(x) but in reverse order. For example, if p(x) = 5(x^4) - 2(x^3) + 4(x^2) + 7 (this is not the actual p(x) that has the above stated roots), then h(x) would be h(x) = 7(x^4) + 4(x^2) - 2(x) + 5.