numbers2know.org

Close Help

Welcome on numbers2know.org !

This website originated as a tool to learn, collect and sort numbers.
Not just any numbers: It provides a topically broad list thereof – worth to be memorized, not just as part of general knowledge, but as a benchmark to gauge the world we live in.
These numbers can either be explored one after another in a quiz-like fashion, or accessed in an aggregated, tabular form. In addition, there is a simple voting mechanism that allows visitors to up- and downvote records to rate their importance.

The purpose of numbers2know.org is not to provide a comprehensive list to look up numbers, but to encourage and support people memorizing selected numerical values of general interest.

For more background information click here.

Modes

There are several modes controlled by the buttons in the top-right of this website:


There are three major modes: Random: Browse the list randomly. Sequential: Browse the list from highest rated to lowest rated records. List: View the complete list in tabular form.	There are two minor modes: All: The complete list is used (random and sequential mode). Top 30: Only the 30 highest rated records are used (random and sequential mode).

Random/Sequential mode

The control panel for these two modes is displayed below the (single) shown record.
There are four groups of buttons:


Control buttons (left): Next: Load the next record (either random or next lower rated) Back: Load the last 20 viewed records (button may be hidden when there is no history available).	There are up to four option buttons (right), from left to right: Notation: Show an alternative notation of the value (different units etc.). Compare: Show a table of other values to compare with. Note: Show additional notes. Reference: Open an external reference for further reading (Wikipedia).


Importance voting (left): Vote: You may up- or downvote each record (arrows), and withdraw your vote by the centered circle. Gauge the records with respect to their relevance for a general audience. Importance: The shown rating is the difference of total up and down votes. It can be positive (rather important) or negative (rather unimportant).	Test mode (right): Disabled (dark): This is the default behaviour. The values of newly loaded records are immediately shown. Enabled (red): This mode allows to test yourself. Only the description is shown, the value is hidden and can be unveiled by hitting (SPACE).

List mode

This mode lists all records in the database in a condensed tabular form.
It provides only a restricted set of the options available in random/sequential mode:

Type: A pictogram indicating the type of the record (length, time, etc.). Can be ordered.
Description: Description of the record. Click to load the record in sequential mode. Can be ordered.
Value: Value of the record.
Importance: Importance and voting-widget for the record. Can be ordered.
The complete database is split into pages with a fixed number of rows. The pages and number of rows per page can be specified above the table.

Miscellaneous

You may share numbers2know.org via the buttons in the lower-right part of this website.

Additional links on the bottom of the page:

About: Show further information about numbers2know.org (how to contribute, legal info, ...).
Shortcuts: Show tooltip with shortcuts for random and sequential mode.
Help: Show this help window.


Loading data ... +
Move mouse over here or hold (SPACE) pressed to show the answer.
	(T)est mode	Back	Next	(N)otation	(C)ompare	More (I)nfo	(R)eference