Maturing Is Using Radians

Unlike the elegant divisibility rules for 2, 3, or 5, checking for divisibility by 7 feels like filing your taxes with a broken calculator. That convoluted "take the last digit, double it, subtract from the rest" trick is mathematical torture that even calculators were invented to avoid. And just like Bernie's persistent campaign messages, this rule keeps showing up in math classes despite everyone silently agreeing we'd rather just do the long division. Pro tip: if you've spent more than 10 seconds applying the rule, you could have just divided the damn number already.

When Fermat said "All Fermat numbers are prime!" Euler basically said "Hold my quill pen" and factored 4,294,967,297 into 641 × 6,700,417... by hand . 🤯 Fermat numbers (2 2 n + 1) were thought to be prime for all values, but Euler crushed that dream with pure mathematical wizardry. He didn't need a calculator, supercomputer, or even electricity—just his brain and possibly an unhealthy obsession with large numbers. Meanwhile, I struggle to calculate a 15% tip without my phone. This is why mathematicians are the original flex masters of history!

The symbol μ (mu) is physics' most overworked letter, forced to represent multiple properties like it's some desperate academic taking on too many research projects to get tenure. In this handshake diplomacy showcase, μ plays five different roles: refractive index (how light bends through materials), magnetic moment (tiny magnets' strength), friction coefficient (why you slip on banana peels), permeability (how magnetic fields penetrate materials), and reduced mass (the mathematical trick that makes two-body problems solvable). Physics notation is basically just finding creative ways to recycle the Greek alphabet until everyone's thoroughly confused.

Ever stared at your code wondering if 2+3*4 equals 20 or 14? That's when you transform into the mighty PEMDAS Frog™, flexing those parentheses muscles! Nothing says "I'm a programmer" quite like triple-checking if multiplication happens before addition or frantically googling "order of operations" at 2 PM on a Tuesday. Next time your code gives unexpected results, remember it's probably not a bug—just your brain temporarily forgetting that parentheses are basically the VIPs of the math world.

The ultimate mathematical showdown! The devil's trying to be slick with his nowhere continuous function that can't be integrated using traditional Riemann methods. Meanwhile, Jesus is calmly showing off the Lebesgue integration technique with those neat little rectangles that can handle even the most pathological functions. 🔥 For the math nerds: Lebesgue integration revolutionized calculus by measuring the domain instead of the range, making it possible to integrate functions that would make Riemann integration cry in a corner. The devil's functions stand no chance against this divine mathematical breakthrough!

The top row shows the mathematical royalty - 0, 1, i, π, and e - looking all smug in their red outfits. But the real mathematical magic happens below with Euler's Identity: e iπ + 1 = 0. This equation is basically the mathematical equivalent of finding out all your favorite celebrities are secretly related. It elegantly connects five fundamental constants in one tight little package, and mathematicians absolutely lose their minds over it. Richard Feynman called it "the most remarkable formula in mathematics." The rest of us just nod and pretend we fully appreciate its profound beauty while secretly wondering if we can use it to calculate our grocery bills. (Spoiler: you cannot.) What makes it truly spectacular is how these seemingly unrelated numbers from different mathematical neighborhoods—an irrational transcendental number (e), an imaginary unit (i), another irrational transcendental number (π), and the most basic integers (1 and 0)—somehow form a perfect equation. It's like discovering your pet goldfish, your car keys, your existential dread, and that sock you lost in 2018 are all secretly part of one cosmic conspiracy.