The Cow Math Test

It seems like a harmless riddle, almost a children’s game… And yet, this very simple scenario of buying and selling cows often challenges our accounting logic. Ready to rack your brains? Embark on a little journey through the numbers… with a touch of humor.

First act: the purchase at €800

Imagine this: You come across a beautiful cow (yes, she looks healthy), and you buy her for  800 euros . So far, so simple. That’s your initial investment.

First sale: €1,000 in your pocket

Good news! You sell that famous cow for  1,000 euros . A quick subtraction: 1,000 – 800 =  200 euros profit . Easy, right?  But the story doesn’t end there…

You buy it back… for more!

Hold on tight: you buy that same cow (or another, equally charming one) for  1,100 euros . Now  you’re starting to hesitate.  You had 1,000 euros after the first sale, so you have to  add 100 euros from your own pocket.  Here we go again, an investment!

Second sale: another profit?

This time you sell the cow for  1,300 euros . Here we go again: 1,300 – 1,100 =  another 200 euros profit . You might think we’re going around in circles…  but the numbers are clear.

So what is the real total benefit?

Here is the logic of the reasoning:

• 200 euros earned on the first sale.
• 200 euros extra on the second sale.

Result: a total profit of 400 euros, concrete and measurable.

But why is this so disconcerting?

Simply because our brain likes to make things more complicated than they are.  As soon as an element comes up (like the cow, here), we feel like we’re « playing again » with the same money or losing track.  We often forget to consider each transaction separately: a purchase, a sale, a calculation.

This type of puzzle shows how  easy it is to get sidetracked by details… instead of focusing on the essentials: a simple, distinct reading of each step.

A lesson more useful than it seems

The moral of the story? Whether it’s a cow, a subscription, or a « good deal » you end up regretting, it’s always best to take a moment to calmly consider the numbers.