Quantitative Aptitude - Arithmetic Ability Questions

What Principal will yield Rs. 120 as Simple Interest at 6% p.a. in 10 years?

What is the value of cosec -150°?

How many times the keys of a typewriter have to be pressed in order to write numbers from 121 to 1346?

Type 1 workers are 2.5 times as efficient as type 2 workers. Twelve Type 1 workers can complete a task in 10 days. How many days would it have taken 4 Type 1 and 15 Type 2 workers to do the same work?

If A and B together do a job in 7.5 days and if A could do the job in 10 days if he worked alone. How many days would B take to do the job if he worked alone?

A wholesaler sells a watch to a retailer at a profit of 25% and the retailer sells it to a customer at a loss of 12%. If the customer pays Rs 1045, what had it cost the wholesaler?

If the radius of the cylinder is increased by 25%, then by how much percent the height must be reduced, so that the volume of the cylinder remains same?

A can finish a work in 18 days and B in 36 days. If they work on it together for 9 days, then what percent of work is left?