Quantitative Aptitude - Arithmetic Ability Questions

Koushik can do a piece of work in X days and Krishnu can do the same work in Y days. If they work together, then they can do the work in

The point R(a,b) is first reflected in origin to R1 and R1 is reflected in x-axis to (-3,4). The co-ordinates of point R are

Which of the following quadratic equations has equal roots?

The number of solutions of the pair of linear equations x + 2y - 8 = 0 and 2x + 4y = 16 is

In the following question, select the odd letter/letters from the given alternatives.

The difference between the largest and the smallest angles of a triangle whose angles are in the ratio of 5:3:10 is

The average of 17 results is 60. If the average of first 9 results is 57 and that of the last 9 results is 65, then what will be the value of 9th result?

A train starts moving from a place P at 10:00 a.m. and arrives at another place Q at 5:30 p.m. on the same day. If the speed of the train is 50 km/hr, then what will be the distance (in km) covered by the train?