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October 27–November 2, 2009

Problem

Solve the following cryptarithm. Each letter D, I, B, O, T, U, R, and N stands for a different digit 0-9.

BOB/DID = .TURNTURNTURNTURN...

[I'm not sure why Bob is spinning like a top—or even who Bob is! :)]

Solution

here.

Greg Rudzinski had the following insight for why Bob is spinning like a top: "I think BOB is a very confused palindrome trying to make a left in San Francisco ;-)"

List of solvers

Both solutions:

Logan Sailer, Huy Hoang-Nguyen, Brian Chinn (undergrad); Lincoln Atkinson, Congpa You, Steve Wilmarth, Lloyd Sakazaki, Qiyuan Wei (outside).

One solution:

Period 4 Calculus at Tacoma School of the Arts (Lilly, Jordan, Grace, Delecia, Amanda, Taylor, and Cyrus Brown) (High School); Mimi Fung, Eui Min Jung, Jonathan Shi, Glenn Bishop, Michael Gostintsev (undergrad); Greg Rudzinski, Neal Johnson, Mukund Tirumalai, Isaac Abraham, Walter (outside).

Brian Chinn wins the prize! Also, the period 4 calculus group gets an unofficial ice cream prize (if they make a trip to the UW to claim it)!