Math Facts That'll Make You Say "Wait, What?" #2

Maths is weird, in the best possible way. It's full of surprises that have nothing to do with tests or worksheets.

These are facts worth sharing with your child. Not because they're educational (though they are), but because they're the kind of thing that makes you look at numbers differently.

Every odd number joined the same club

One. Three. Five. Seven. Nine. Eleven. Thirteen.

Spell out any odd number in English and you'll find the letter "e" in it. Every single one, all the way to infinity. The even numbers don't have this. "Two," "four," and "six" are all missing it. "Eight" sneaks in, but it's the exception.

This isn't deep mathematics. It's a quirk of language colliding with number theory. But it's the kind of pattern that teaches children something useful: when you notice one odd thing, check whether it's always odd. That instinct, test it again and see if it holds, is the beginning of mathematical thinking. The context is letters. The skill is universal.

A number bigger than everything

A googol is a 1 followed by 100 zeros. Written out, it looks absurd:

10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000

There are roughly 10^80 atoms in the observable universe. A googol is larger than that. It describes a quantity bigger than everything that physically exists.

Then there's the googolplex: 10 raised to the power of a googol. You couldn't write this number out if you used every atom in the universe as a digit. It would still not be enough. A 9-year-old named Milton Sirotta coined the word "googol" in 1920. His uncle, the mathematician Edward Kasner, asked him to name a number that was unimaginably large. Milton obliged. Adults thought it was charming, and the name stuck. Google (the company) is named after it, though they misspelled it.

The googol is useless in any practical sense. No equation needs it. No measurement uses it. But that's rather the point: maths can describe things that don't exist and be completely precise about them. For a child, that's a strange and important idea: that a number can be real without being about anything real.

What none of this is

These aren't tricks to make your child better at arithmetic. Knowing about googols won't help with long division. The "e" in odd numbers won't appear on any test.

What they do is something quieter. They show a child that numbers have behaviour: patterns, surprises, personality. That maths is something you can notice, not just something you practise. Children who see maths as a landscape of odd facts and hidden structures tend to find formal maths less alien when it arrives. Not easier, necessarily. Less mysterious.

That distinction matters more than most parents realise.