Quantitative Aptitude - Arithmetic Ability Questions

If a boat goes upstream at a speed of 21 km/h and comes back the same distance at 28 km/h. What is the average speed (in km/hr) for the total journey?

The average weight of Shivshankar, Gopesh and Reena is 97 kg. If the average weight of Shivshankar and Gopesh is 93 kg and that of Gopesh and Reena is 82 kg, then the weight of Gopesh is

If the curved surface area of a right circular cone is 3080 sq cm and its slant height is 35 cm, find its total surface area?

What is the length of the arc whose central angle is 30° and radius of the circle is 21 cm?

Two numbers are 35% and 50% lesser than a third number. By how much percent is the second number to be enhanced to make it equal to the first number? 

A discount series of 15%, 20% and 25% is equal to the single discount of?

Select the related number from the given alternatives.
0.02 : 0.002 :: 1/3 : ?

If x + (1/x) = 2, then what is the value of x21 + (1/x1331)?