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20% off plus an extra 10% is not 30% off: stacked discounts explained with a real example
Guides

20% off plus an extra 10% is not 30% off: stacked discounts explained with a real example

By Elias Thorne • 09/28/2026 • 4 minutes of reading
Your estimated one-rep max can be off by 10% or more: here's how to read it
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Your estimated one-rep max can be off by 10% or more: here’s how to read it

By Elias Thorne • 09/27/2026 • 3 minutes of reading
Gypsum vs lime plaster: what's the real difference before you start a wall?
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Gypsum vs lime plaster: what’s the real difference before you start a wall?

By Elias Thorne • 09/26/2026 • 4 minutes of reading
Renting a car abroad? Here's the fuel economy math you actually need
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Renting a car abroad? Here’s the fuel economy math you actually need

By Elias Thorne • 09/26/2026 • 4 minutes of reading
The simple formula behind the calorie count on your food label
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The simple formula behind the calorie count on your food label

By Elias Thorne • 09/25/2026 • 3 minutes of reading
Is a tip really mandatory? Here's what the law actually says
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Is a tip really mandatory? Here’s what the law actually says

By Elias Thorne • 09/24/2026 • 3 minutes of reading
How to calculate unit price and never overpay at the grocery store
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How to calculate unit price and never overpay at the grocery store

By Elias Thorne • 09/23/2026 • 3 minutes of reading
Starting a cardio routine? Here's the target heart rate math you need
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Starting a cardio routine? Here’s the target heart rate math you need

By Elias Thorne • 09/23/2026 • 3 minutes of reading
The simple formula behind estimating how many bricks you need
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The simple formula behind estimating how many bricks you need

By Elias Thorne • 09/22/2026 • 3 minutes of reading
Why flying east feels worse than flying west (and how long jet lag actually lasts)
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Why flying east feels worse than flying west (and how long jet lag actually lasts)

By Elias Thorne • 09/21/2026 • 4 minutes of reading
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