## IEEE Weekly Puzzle #31 – Number of Digits

You are asked to calculate 2^2015 and 5^2015 using a computer, and then to write down your results on a piece of paper. If you spend 1 second writing each digit of the results,

Read More »## PUZZLE… PUZZLE… PUZZLE…

SAMURAI SUDOKU & SUDOKU 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

Read More »## IEEE Weekly Puzzle #31 – Number of Digits

You are asked to calculate 2^2015 and 2^2015 using a computer, and then to write down your results on a piece of paper. If you spend 1 second writing each digit of the results,

Read More »## PUZZLE… PUZZLE… PUZZLE…

SAMURAI SUDOKU & SUDOKU 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

Read More »## PUZZLE… PUZZLE… PUZZLE…

SAMURAI SUDOKU & SUDOKU 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

Read More »## PUZZLE… PUZZLE… PUZZLE…

ABC PATH & SUDOKU Here are four puzzles: two ABC Path puzzles and two Sudoku puzzles. Fill in the Sudoku puzzles so that each column, row and 3×3 grid contains all of the digits

Read More »## PUZZLE… PUZZLE… PUZZLE…

ABC PATH & SUDOKU Here are four puzzles: two ABC Path puzzles and two Sudoku puzzles. Fill in the Sudoku puzzles so that each column, row and 3×3 grid contains all of the digits

Read More »## IEEE Weekly Puzzle #30 – Truthful/Liar/Uncertain

In a room we have 20 people who either lie, tell the truth or are uncertain. Those who tell the truth always tell the truth; those who lie always lie; and those who are

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