SUDOKU

April 21, 2014

Here are three puzzles: a Samurai Sudoku, and two regular Sudokus. The Samurai Sudoku puzzle is made up of five smaller Sudoku puzzles: one in the center and the other four overlapping the corner

IEEE Weekly Puzzle

April 14, 2014

#20 – Month and Day What is the probability that the months (January, February,…December) and days (Monday, Tuesday,… Friday) of birth of two randomly chosen individuals are identical? The Prize for This Question: Rubik’s

SUDOKU

April 14, 2014

Here are three puzzles: a Samurai Sudoku, and two regular Sudokus. The Samurai Sudoku puzzle is made up of five smaller Sudoku puzzles: one in the center and the other four overlapping the corner

IEEE Weekly Puzzle

April 7, 2014

#19 – Cube The net of a cube is displayed in the figure. What can the maximal value of the summation of the sides that meet at any vertex be? The Prize for This

SUDOKU

April 7, 2014

Here are three puzzles: a Samurai Sudoku, and two regular Sudokus. The Samurai Sudoku puzzle is made up of five smaller Sudoku puzzles: one in the center and the other four overlapping the corner

IEEE Weekly Puzzle

March 31, 2014

#18 – Four-Digit Number We have a four-digit number, each of whose **************** digits is a different number. The number itself (ABCD) and its reversed version (DCBA) are divisible by the sum of its

SUDOKU

March 31, 2014

Here are three puzzles: a Samurai Sudoku, and two regular Sudokus. The Samurai Sudoku puzzle is made up of five smaller Sudoku puzzles: one in the center and the other four overlapping the corner