The table below shows the number of toffees needed for different number of students. If each student should get same number of toffees, how many toffees are needed for 17 students?

In a 4x100 m relay race, Emad runs the first 100 metres in XXII seconds. Adela runs the second leg in XV seconds. Jalila runs the 3rd leg in XVIII seconds and Basma runs the final 100 metres in XIX seconds. In how many seconds did they complete the race (in roman numerals)?

The ratio of speed of two vehicles is 3:2. If first vehicle covers a distance of 160 km in 2 hours, then how much distance will second vehicle cover in 3 hours ?