gigastasioFeb 20

I've had this puzzle on my phone for years. Every few months I'd glance at it and try and solve it. Last night, as I was eating dinner, I finally figured out the answer!

https://sh.itjust.works/post/55641581

Show threadSunkblake
12
Feb 21 at 7:12amWeb
Show threadSoGrumpyFeb 21

No, the ?=15

The right-hand number minus the left-hand number equals the lower number: 99-72=27 Therefore 36-21=15

Show threadtamal3Feb 22
Plz fix spoiler tags
Show threadSunkblakeFeb 23

Looks like this for me?

Show threadtamal3Feb 23
It didn’t help but I appreciate you trying. I think this is the moment I realize Sync is so wildly unsupported that it can’t read spoiler tags. Sigh. That’s on me.
Show threadSunkblakeFeb 23
Ah, dang sorry for ruining it for you.