Showing 281–300 of 1,000 ranked alternatives.
Red Key Software Corporation
Play puzzles anytime
Solve puzzles with 1,000 unique handcrafted puzzles across four skill levels. Choose from standard, symmetrical, and patterned styles. Adjust color schemes. View incorrect answers in red. Track times.
Tang Cho man
Play with themes
Play by filling a 9x9 grid with numbers so each row, column, and 3x3 box contains 1-9 without repetition. Solve puzzles with varying difficulty levels. Track progress and complete daily challenges.
Beijing RongDaLianZhi Technology Services Co., Ltd.
Solve puzzles and track progress
Play by filling a 9×9 grid with digits 1-9. Choose from easy, medium, hard, master, or free difficulty modes. Solve puzzles with diagonal, odd-even, or irregular variations. Track progress and adjust difficulty step by step.
PROGRAMIS PRIME LLC
Teach with step-by-step guidance
Teaches of multi-digit numbers with step-by-step guidance. Tracks student progress and identifies areas needing practice. Provides visual and auditory encouragement. Allows parents and teachers to view progress and focus on specific skills.
Magma Mobile
Solve puzzles with number clues
Solve puzzles by filling a grid with numbers that add up to given clues. Each row and column must contain unique digits. Complete the grid by ensuring all sums match clues and no duplicates exist in any sum.
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