Popular puzzle invented in Japan

• Newspaper puzzle suggested by this crossword's shaded squares
• Perhaps Bruce doubles as 6's relative
• Diversion also called MathDoku
• Math puzzle
• Puzzle whose name means "cleverness squared"
• Numbers game
• Sudoku-like puzzle

Wikipedia Word definitions in Wikipedia
Kenken may refer to: KenKen puzzle Kenken (bell) , of Kouroussa in northwestern Guinea