Quantitative Aptitude - Arithmetic Ability Questions

What is the value of cosec -150°?

If cosC + cosD = x, then value of x is

P can do a work in 10 days. Q can do the same work in 15 days. If they work together for 5 days, how much of the work will they complete?

Devansh's birthday is on Friday 14th April. On what day of the week will be Rohan's Birthday in the same year if Rohan was born on 20th September?

If a boat goes a certain distance at 30 km/hr and comes back the same distance at 60 km/hr. What is the average speed (in km/hr) for the total journey?

The radius of base of solid cone is 9 cm and its height is 21 cm. It cut into 3 parts by two cuts, which are parallel to its base. The cuts are at height of 7 cm and 14 cm from the base respectively. What is the ratio of curved surface areas of top, middle and bottom parts respectively?

The cost price of 25 books is equal to the selling price of 20 books. The profit percent is

A can do a work in 15 days and B in 9 days. If they work on it together for 5 days, then what fraction of work is left?