Alferno-Princip is a comet that orbits around the sun once in 16 years, and Shell-Waters is a comet that orbits around the sun once in 128 years. The last time they were seen together in the sky was in 2001. In which year will they be seen together in the sky next?
In a competitive exam, there are 40 questions. Students can score 4 marks for each correct answer while 1 mark is deducted for each incorrect answer. If Hannah answered 31 questions correctly, how many marks did she get?
Kian wrote an exam which had 21 questions. Each question he answers correctly gets him 10 marks. However, he loses 5 marks for each question he answers incorrectly. He attempted all the questions and got a total of 105 marks. How many questions did he answer wrong?
Frankie bought the following things when he got his first salary: A camera for £ 1140.65 A microwave for £ 6159.15 A refrigerator for £ 23467.70 If his salary was £ 70000, what does he have left after all the shopping?