eSpyDedicated desktop and mobile modes
Desktop preserves the full Extra Large puzzle experience, while Mobile generates a smaller compact puzzle instead of simply shrinking the desktop layout.
Student helper · Level 14
Cross Math Puzzle
Practice arithmetic through connected deduction puzzles built for both desktop and mobile interaction.
Desktop + Mobile · Hard Reasoning · Deterministic Seeds · Print Ready
1ChooseDesktop / Mobile
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2SolveConnected Blanks
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3CheckInstant Validation
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4ContinueNext Deduction
2dedicated interaction modes
38 × 32desktop default grid
18 × 16mobile compact grid
L14authoritative puzzle build
Best features
One puzzle system, designed differently for desktop and mobile.
Cross Math Puzzle keeps a shared generator, answer truth, validation, progress, timer, seed logic, and print engine while adapting the interaction to the device.
Connected deduction puzzles
Hard-mode arithmetic puzzles use connected equations and longer dependency chains so students solve through relationships rather than isolated facts.
Fast answer entry + validation
Desktop supports typed numeric entry and an answer-value keypad. Mobile uses a compact digit-only keypad with correct-prefix handling and reddish wrong-answer feedback.
Floating keypad near the target
On mobile, the keypad can auto-position beside the selected blank, remain fixed while scrolling, and be dragged manually when the student wants a different position.
Deterministic puzzle generation
The current seed is preserved across modes, supporting repeatable puzzle generation and consistent worksheet versions.
Worksheet preview + printing
The interactive controls stay out of print output while the puzzle can be printed as a clean worksheet from either desktop or mobile-generated layouts.
Student support
Reasoning practice beside the Configurator.
The Question Configurator remains eSpyMath's flagship product. Cross Math Puzzle adds a more game-like arithmetic and deduction experience for students.