Get out your timer and number two pencil to see if your arithmetic skills from grade school are still intact.

What is 8.8–8.11? Feed it into a calculator, and pop comes the answer. Ask your favourite AI models instead, and chances are, most will be in a tizzy. We tested this simple subtraction task on a range ...

Let’s keep things simple – this is basic math. Nothing scary. Just everyday calculations, a bit of geometry, some number patterns, and the kind of stuff you definitely learned in school at some point.