Quantitative Aptitude - Arithmetic Ability Questions

Two cyclists P and Q cycle at 20 km/hr and 16 km/hr towards each other respectively. What was the distance (in kms) between them when they started if they met after 40 minutes?

A car can cover 350 km in 4 hrs. If its speed is decreased by 12.5 kmph. How much time does the car take to cover a distance of 450 kms.

If 15 persons can do a job in 30 days, then 30 persons with twice the efficiency can do the same job in how many days?

10 persons can do a job in X days. If 20 persons with twice the efficiency can do the same job in 5 days, then find the value of X?

Arun and Amit can do a piece of work in 9 days and 12 days respectively. If they work for alternate days and Amit starts the work first, then in how many days 35/36 parts of whole work will be completed?

When a discount of 25% is given on a box of popcorn, the profit is 25%. If the discount is 10%, then the profit is

The sum of the ages of Rohit and Ankit is 78. Rohit's age is twice the age of Ankit. What is the age (in years) of Rohit?

The reciprocal of the sum of the reciprocals of 8/7 and 5/6 is: