Every Puzzle Page Cross Sum answer published during 2021 — 192 solved grids in total. Each date below opens the completed board for that day.
This is one year of the full Cross Sum archive, which runs from 2018-01-01 to 2026-08-31. You can also browse all 20 Puzzle Page games.
2021 Cross Sum Answers
How Puzzle Page Cross Sum Works
A number crossword. Each run of cells must add up to the total shown, using digits that never repeat within the run.
Tips for Puzzle Page Cross Sum
- 1
Start with runs that have only one possible combination — a two-cell run totalling 4 must be 1+3.
- 2
Intersections are where the puzzle opens up: a digit must satisfy both its across and down run.
- 3
Write candidate sets in the margin for short runs; long runs are rarely worth listing.
- 4
Extreme totals are your friends — the highest and lowest are the most constrained.
- 5
Start where a row clue and a column clue both have few possible combinations. Their overlap is usually a single digit.
- 6
No digit repeats inside one run, so a long run with a low total is heavily constrained and is the right place to begin.
Puzzle Page Cross Sum Facts
| Puzzle type | Cross Sum |
|---|---|
| Year | 2021 |
| Puzzles this year | 192 |
| Full archive | 3,033 puzzles |
Puzzle Page Cross Sum Questions
Can a digit repeat in a run?
Is zero used?
How many Cross Sum answers are in this archive?
What is Cross Sum?
Can a digit repeat inside one run?
Are zeros used?
3 Tips for Puzzle Page
The board is the whole puzzle
Every answer is built from what the level actually shows you and nothing else. Counting that first rules out most of what comes to mind, which is quicker than trying words and being rejected.
Place the longest answer first
Long answers use up the awkward letters and leave a set that spells the short ones out for you. Starting long is consistently faster than sweeping for three-letter words.
Neighbouring levels are the best hint
Difficulty climbs gradually rather than in jumps, so the levels either side of a hard one reuse its patterns. They are more useful than any hint the game sells you.
How to Solve a Puzzle Page Level
The order that clears a board fastest.
Read what you are given
Letters, tiles or clues — count them before you start. That constraint is the strongest filter you have.
Anchor with the answers you are sure of
Each confirmed answer narrows the ones it touches, so the easy entries are worth the first minute.
Work outwards
Follow the chain from what you have placed rather than jumping around the board.
Verified Answers, Not Guesses
How we verify these answers
Every answer on this page is read from the game's own puzzle data rather than retyped from another site, and is checked against what the board actually provides — so nothing listed can use a letter the level does not give you. The counts shown are computed from the stored data, not typed in by hand.
Reviewed by Priya Raghunathan, Word Games Editor at Puzzle Solved. The full checking routine is in the methodology, and the standards every page is held to are in the editorial policy.
Last checked — Aug 24, 2026