The GG Network blog — page 15
Free lessons that leave you a little sharper every visit — plus deep guides to the professional tools. Knowledge shouldn't sit behind a paywall.
SHA-256 is not encryption and there is no reverse operation. Here is what a hash is genuinely good for, and one job it is the wrong tool for.
Length and unpredictability, not punctuation theatre. And a strength meter estimates — it does not know.
A cup measures space, not mass, and the same cup of flour can hold noticeably different amounts depending on how it was filled. Why the dry conversion is ingredient-specific and can never be one number.
Two scales that do not share a zero cannot be converted by multiplying. The arithmetic behind the 1.8, the mental shortcut and exactly how wrong it gets, and the one reading where both scales agree.
The ingredients are a straightforward multiplication. The tin and the depth are geometry, and time follows the depth rather than the quantity — which is why doubling is not simply doubling.
Ounces, pints and tons all mean two or three different things depending on which side of the Atlantic wrote them down. The exact definitions, and the differences that are big enough to matter.
A rate moving from 4% to 6% rose 2 percentage points and 50 percent. Both statements are true, they are not interchangeable, and the wrong one gets quoted constantly.
Swap the two numbers and you get a different answer that still looks reasonable. Here is how to tell which number is the whole — and the difference between percent of and percent more than.
How far off was the estimate? The number you divide by decides the answer, and dividing by your own estimate quietly flatters you.
Every line is right, the total is right, and they disagree by a penny. That is rounding doing exactly what it does — plus why half-up and half-even give different answers.
Two discounts applied one after the other multiply, they do not add. “50% off, then an extra 20% off” is 60% off, and here is the arithmetic that shows why — plus the one case where the order really does matter.
Move the decimal point one place and you have 10%; everything else is halves and doubles of that. Then the harder part — splitting a bill where people ordered very differently, and the pre-tax question, both put to you as choices rather than rules.