Brain Train with Professor Labcoat #3

[OscarW]

Professor Labcoat is an educational game series dedicated to train and challenge your brain. This is the 3rd part the series.

Play Here

Please use spoilers for hints and walkthroughs:
[spoiler=Title Here]Enter text here...[/spoiler]

Please do not post a video walkthrough for 7 days.

[Purp]

I wish they'd tell you what number(s) are wrong so you aren't going crazy...