Am i right for 6 and 7 also with 8, 9, 10 and 11 plz

Yes, you are correct on 6 and 7.
#8: A standard number cube has six sides (numbers 1 through 6). There is only one 5, therefore, would be the fraction.
#9:The spinner having three sides. Pretend there are only two sides, the red and white [2]. Again having three side, the fraction would be [/tex]\frac{2}{3} [/tex]. I apologize if I explained this one a little weird. Need anymore help or have any questions? Message me or just comment. Hope I helped a little.

The lateral side of a triangular pyramid is a triangle. in order to increase the lateral surface area, the slant height and the height should be altered