Quantitative Aptitude - Arithmetic Ability Questions

A 150 m long train, travelling at 54 km/h, crosses a platform in 42 seconds. What is the length of the platform?

A car travels a certain distance at 32 km/h and comes back at 68 km/h. What is the average speed for total journey?

If Mr. Raghav taught a total of 500 hours, then what is the difference in number of hours of teaching algebra and modern Maths?

10 identical solid spherical balls of radius 3 cm are melted to form a single sphere. In this process 20% of solid is wasted. What is the radius (in cm) of the bigger sphere?

The HCF of two numbers is 12 and their LCM is 72. If one of the two numbers is 24, then the other number is

If a+b=5 then the value of a-37+b-27 is

If the sum of the digits of any integer between 100 and 1000 is subtracted from the same integer , the resulting number is always divisibleby

Area of _____ equals half the product of its diagonal.