2 puzzles per page. Best fitness, warm-up, training and positive energy for the brain. 30 Killer sudoku puzzles 6x6 easy levels. 30 Killer sudoku puzzles 8x8 medium levels. 30 Killer sudoku puzzles 10x10 hard levels. 30 Killer sudoku puzzles 12x12 extreme levels. 30 Sudoku Calcudoku easy levels. 30 Sudoku Calcudoku medium levels. 30 Sudoku Calcudoku hard levels. 30 Sudoku Calcudoku extreme levels. Killer sudoku. This Sudoku leads step by step to the top of the skill. It is necessary to fill empty cells with numbers from (1 to 6; 1 to 8; 1 to 9; 1 to 10; 1 to 12), each of the digits should appear only once in each row and column of the 6x6; 8x8; 9x9; 10x10; 12x12 square. The sum of all the numbers in the cage must correspond to the number printed in the corner. They can be called figurative or geometric, they also have names (Killer Jigsaw Sudoku, Killer Geometry Sudoku, Killer Irregular Sudoku, Killer Kikagaku Nanpure). Calcudoku - this is a mathematical and logical puzzle. It is necessary to fill the grid with numbers so that in each line and in each column they are not repeated. The number in the corner of each selected block is the result of an arithmetic operation on the digits in this block. The numbers inside the block can be repeated. All signs of mathematical signs are hidden. The puzzle can be called Square Wisdom, Kendoku. Unique puzzles. Only 1 verified solution. All answers are at the end of the book. Killer sudoku may be called or searched with the following phrases or names: sudoku, sum sudoku, killer sudoku books, times killer sudoku, sumdoku, sudoku books, easy killer sudoku, times killer sudoku books, killer sudoku puzzles, puzzle, the times killer sudoku books, times ultimate killer sudoku books, sudoku 9x9, killer sudoku puzzle books, killer puzzle, sumoku sudoku, sudoku puzzels, sudoku game, sudoku puzzle books, daily killer sudoku, daily sudoku killer, sudoku puzzles, sudoku for kids, easy sudoku puzzles, times killer sudoku solutions, super sudoku, daily sudoku, game sudoku, sudoku tips, sudokus, how do you play sudoku, play sudoku, sudoku solver, how to do sudoku, the times ultimate killer sudoku, play killer sudoku, sudoku answers, ultimate killer sudoku. Calcudoku may be called or searched with the following phrases or names: cendoku, calcudoku, kendoku, sudoku game, maths puzzles, kendoku puzzles, daily sudoku, mathdoku answers, calcudoku solver, mathdoku solver, sudoku puzzles, sudoku brainium, malacca, sudoku math puzzles, maze, mathdoku, mathdoku puzzles with answers, campo santo, jigsawdoku, futoshiki, inky puzzles, fantino, sparkchess, shabash, mandate, permainan sudoku, dkm shisen, sudoku sudoku, math sudoku, calcudoku answers, qonqr, beachball pop, mathdoku rules, sudoku puzzle game, itrash, calcudoku rules, calcudoku puzzles, iball touch, andoku, void runner, numby, mathdoku 9x9 answers, life sim, nextoy llc, sudoku normal, sumoku sudoku, puzzles similar to sudoku, punch clock, hitoshi puzzle. I hope you enjoy the book. Best regards, Basford Holmes