Maths Mystery

This is my Maths Mystery to solve who is the naughty gnome I worked with Kingston for the maths Mystery we needed to go to meetings at diffrent times so I had to work on it for half an hour while Kingston was at his meeting so when I had a meeting Kingston had to work on it.https://docs.google.com/presentation/d/1Scda6ZhvRYNAGiwi-9k88liALmgogcj3tFf0Fiv3BxE/edit#slide=id.g8533db3180_0_218