Arithmetic Sequence - online puzzle game

overview

Arithmetic Sequence is a math puzzle game where you identify the common difference in a number pattern and fill in the missing terms. Each sequence follows a consistent rule: every pair of consecutive numbers differs by the same amount.

rules

• Each sequence has a fixed common difference (d) between consecutive terms.
• Some terms are hidden — your job is to figure them out.
• Use the visible numbers to calculate d, then fill in the blanks.
• All answers must be exact integers (no decimals).

controls

• Click a blank cell to select it.
• Use the on-screen numpad or keyboard to type a number.
• Press ⌫ to delete the last digit, or Clear to reset.
• Use the ± button to toggle negative numbers.
• Press Check to verify, Hint for help, Undo to revert.

scoring

You earn points for each correctly completed sequence. Faster solutions and fewer hints yield higher scores. Each hint deducts a small penalty. Completing puzzles without any hints earns bonus points. Difficulty multiplier: Easy x1, Medium x2, Hard x3.

tips

• Look for two adjacent given numbers to calculate the common difference quickly.
• If no two adjacent numbers are given, find the difference over a gap and divide.
• For negative differences, the sequence decreases — don't forget the ± button.
• Double-check by verifying d across all given pairs before submitting.

faq