SEQUENCD

About SEQUENCD

SEQUENCD is a free browser number puzzle dressed up as an old teletext page, complete with blocky colours and scanlines. Its puzzles are numbered from 1 January 2024 and chosen from the UTC date, so every player worldwide gets the same sequence.

Each puzzle is a row of numbers following a hidden rule, with one number missing. You type your answer and submit; a correct guess ends the round, a guess within 10 percent of the answer is marked close, and anything else is wrong. You have three attempts, and a hint button gives a nudge if you are stuck.

Puzzles are drawn with a weighting towards medium and harder sequences, and after you finish the game shows the difficulty and the pattern behind it. A timer, stats, a guess distribution and a streak counter track your record, and results can be shared as text or an image. Optional reminders can nudge you each morning.

It suits people who like number patterns and IQ-test style questions and want something that takes a minute or two.

How to play SEQUENCD

1. Open SEQUENCD to see today's sequence with one gap.
2. Work out the rule that links the numbers.
3. Type the missing number and press Submit.
4. Use the close or wrong feedback to refine your next guess.
5. Solve within three attempts, then see the pattern and difficulty.

Tips

• Check the differences between neighbouring numbers, then the differences of those differences.
• Try ratios too: doubling, squares and powers are common.
• A close result means you are within 10 percent, so adjust a little rather than change the rule.

Questions