Sunerva-Primo is a comet that orbits around the sun once in 18 years, and Selucid is a comet that orbits around the sun once in 315 years. The last time they were seen together in the sky was in 2004. In which year will they be seen together in the sky next?

Wei bought the following things when he got his first salary: A music system for $ 1909.15 A microwave for $ 3100.75 A computer for $ 18126.60 If his salary was $ 60000, what does he have left after all the shopping?

Wei travels a total of 7.4 kilometers. He walks 800 meters and takes a bus for the rest of the distance. What is the ratio of the distance traveled by walking to the distance covered by bus?

An article with price tag of $800 is sold at 5% discount. Due to off-season shopkeeper provides additional discount of 10% on the discounted price. Find the selling price of the article.