DOP 2: Delete One Part Level 821-830 Answers
Level 821: Rub the yellow circle to make a triangle.
Level 822: Rub off his mattress.
Level 823: Rub off the left central part of the picture.
Level 824: Rub off the legs of the ironing table.
Level 825: Rub off the column of the street light.
Level 826: Rub off the blue bowl of the light above him.
Level 827: Rub the left part to match the right one.
Level 828: Rub off the foam on the arm.
Level 829: Rub off the green bush.
Level 830: Rub the vacuum cleaner.