How does Ordering work?

Pick which topics you want in the rotation at the top (history, size, rank). Each round shows several items in random order; tap them in the correct order. After the last tap the game reveals the true values and your streak advances if you got them all right.

Why was this merged from three games?

The three former games (Order by When, Order by Size, Sort em up) all shared the same OrderingMini shell, the same difficulty curve, and the same round shape. Splitting them into separate landing pages was taxonomical noise; merging gives the player one place to build an ordering streak with the topic mix they prefer.

Can I lock to one topic?

Yes. Toggle off the topics you don't want and only your chosen topic appears each round. All three are on by default; the picker remembers your last selection.

How does difficulty work?

Difficulty controls how close in value the items sit · easy spreads them across the full range so ordering is mostly common sense, hard bunches them so the exact numbers matter.

Where do the items come from?

History pulls from a hand-curated pool of internationally-known events (shared with the When Did and Who Did games). Size pulls from standard reference figures (planet diameters, building heights, etc.). Rank pulls from documented values (neuron counts from Suzana Herculano-Houzel, athlete weights from sports profiles, city distances by great-circle calculation).

How does my progress save?

Best streak is saved locally in your browser.

Ordering

Put items in order · historical events by date, planets and animals by size, or rank by an objective value. Pick the topic mix

FAQ

About PlayMemorize Ordering

PlayMemorize Ordering is the merged ordering trainer. Three round shapes share one landing page and one streak · chronological events (formerly Order by When), sized items by size (formerly Order by Size), and rank-by-numeric-property (formerly Sort em up!). Pick which topics are in the rotation at the top of the page; the engine pulls from whichever subset you enable.

History topic. Several internationally-known historical events appear in random order. Tap them oldest first. Difficulty controls how close in time the events sit · easy spans millennia, hard squeezes them into a single century where exact dates matter.

Size topic. Items from one of six categories (planets, animals, buildings, mountains, countries, bodies of water) appear in random order. Tap them smallest to largest. A round only ever mixes inside one category, so you're never asked "is a giraffe taller than France".

Rank topic. Items ranked by an objective numeric property · animals by neuron count, athletes by body weight, city pairs by great-circle distance. Tap them in ascending order of the property the round asks for.

One streak across all enabled topics. Each correctly-ordered round adds to your streak; one mistake resets it. Toggle individual topics off to drill one shape, or leave all three on for a polymath gauntlet of ordering.

Part of the PlayMemorize family of brain-training games. Runs entirely in your browser, works offline as a Progressive Web App.

How to master

FAQ

How does Ordering work?

Pick which topics you want in the rotation at the top (history, size, rank). Each round shows several items in random order; tap them in the correct order. After the last tap the game reveals the true values and your streak advances if you got them all right.
Why was this merged from three games?

The three former games (Order by When, Order by Size, Sort em up) all shared the same OrderingMini shell, the same difficulty curve, and the same round shape. Splitting them into separate landing pages was taxonomical noise; merging gives the player one place to build an ordering streak with the topic mix they prefer.
Can I lock to one topic?

Yes. Toggle off the topics you don't want and only your chosen topic appears each round. All three are on by default; the picker remembers your last selection.
How does difficulty work?

Difficulty controls how close in value the items sit · easy spreads them across the full range so ordering is mostly common sense, hard bunches them so the exact numbers matter.
Where do the items come from?

History pulls from a hand-curated pool of internationally-known events (shared with the When Did and Who Did games). Size pulls from standard reference figures (planet diameters, building heights, etc.). Rank pulls from documented values (neuron counts from Suzana Herculano-Houzel, athlete weights from sports profiles, city distances by great-circle calculation).
How does my progress save?

Best streak is saved locally in your browser.