Move one rod to make this a true mathematical equation. I know of three valid answers.
13
2
1
18
6 - 4 ≠ 4
1
9
Replying to @hennovanarkel
Wow, OK, make that four valid solutions!

Oct 21, 2021 · 9:50 PM UTC

1
6
Replying to @hal_pomeranz @hennovanarkel
Similarly, 5 + 4 ≠ 4
2