Expert Sudoku vs YinYu Math Game

Join over 21,000,000 of our fans and download one of our Sudoku games today! Makers of the Best Sudoku Game of 2008, Sudoku (Free), we offer you the same great features with 1000 extremely difficult puzzles! Warning! Expert Sudoku is for serious Sudoku players. Our hand-crafted puzzles are solvable with only one solution and no guessing. Show your expertise using advanced solving techniques: Naked and Hidden Triples, X-Wing, XY-Wing, Swordfish, Forcing Chain, 2-string Kite, Skyscraper, Unique Corner, and more. OPTIONS All options are OFF by default, but you can turn them on in the Options menu • Show Incorrect :: Shows incorrect answers in red. • Smart Buttons :: Disables the number button when that number is completed on the game board. • Smart Notes :: Removes the number from the notes in the box, column, and row that contains the cell with your correct answer. FEATURES • 1000 unique handcrafted puzzles • Four different skill levels • ALL puzzles are solvable WITHOUT guessing • Multiple color schemes • Challenge a friend • "ALL notes": tap the "All notes" button on to show all the possible answers for each square. Tap the "All notes" button off to remove the notes. • Hints: shows the answer for the selected square or a random square when one is not selected • Pause the game at any time and resume where you left off • Best times, progress statistics, and much more Are you a Sudoku Master? Then play Expert Sudoku; you will love it! Otherwise, check out our other popular Sudoku games for iPhone and iPod Touch. Do you want more? Try one of our other versions of sudoku which have all the same great features! * Look for our paid edition of Sudoku with 1000 easier puzzles. * Or try Color Sudoku for a fun twist to solving sudoku puzzles.

YinYu is a wonderful, fascinating mathematical game for children of all ages (over 9 years old is recommended)! The Yinyu math game app is especially targeted for STEM programs in middle school and high school. YinYu uses PEMDAS to evaluate the polynomial expressions so children play a game while learning how to evaluate and build PEMDAS algebraic expressions. PEMDAS algebraic expressions are used in mathematics and in computer software evaluations. We have a YinYu Worldwide Leader Board for keeping track of your scores. Try to be Ranked World Number #1!! There are three major steps with 17 levels in each step. Step 1 - Levels 1 – 17 (Start Levels): The game will randomly select numbers from 1 through 20. You must solve for the given answer using the three numbers (operands) and two operators. Every time you solve a question you go up to the next level and gain higher and higher scores to post to the Leader Board!! Step 2 - Levels 17 -34 (Harder Levels) The game will randomly select numbers from 1 through 100. You must solve for the given answer using four numbers and three different operators. Base score points double. Step 3 - Levels 34 and up (Hardest Levels): The game will randomly select numbers from 1 through 100. You must solve for the given answer using all 5 numbers and all 4 operators. Base score points triple. Score points are earned by the remaining time on the timer, if time expires and you can solve the puzzle and base points are earned. The Leader Board is Global and is stored in the Apple cloud using Apple App cloud Services.