List questions from big-list | MathQa

What are some false proofs for true or false statements where the error in the proof is not obvious?

Published on 05 Jan 2025 - 21:16

How many six digit numbers start with the same two digits and end with the same three digits?

Published on 09 Jan 2025 - 7:10

$2=1$ Paradoxes repository

Published on 12 Jan 2025 - 19:10

Exercises on group theory

Published on 12 Jan 2025 - 17:48

Unconventional mathematics books

Published on 29 Dec 2024 - 6:00

Is there a property in $\mathbb{N}$ that we know some number must satisfy but don't know which one?

Published on 29 Dec 2024 - 9:52

Examples of bi-implications ($\Leftrightarrow$) where the $\Rightarrow$ direction is used in the proof of the $\Leftarrow$ direction.

Published on 28 Dec 2024 - 9:21

Theorems relating to the limitation of mathematics

Published on 29 Dec 2024 - 6:48

Examples of generalized geometric series.

Published on 12 Jan 2025 - 19:10

What does Hartshorne do wrong?

Published on 12 Jan 2025 - 18:24