A number of points are marked on a plane and are connected pairwise by a line segment. If the total number of line segments is 10, how many points are marked on the plane ?

A sum of money becomes eight times in 3 years if the rate is compounded annually. In how much time, the same amount at the same compound interest rate will become sixteen times?

Ram spends Rs.3620 for buying pants at the rate of Rs.480 each and shirts at the rate of Rs.130 each. What will be the ratio of pants to shirts when maximum number of pants are to be bought ?

Let us work with the options. For (a), total cost = 7$\times$480 + 2$\times$130=3620 For (b), total cost = 7$\times$480+3$\times$130=3750 For (c), total cost = 2$\times$ 480 + 7$\times$ 130 = 1870 Hence, option (a) is correct.

Two trains each of 120 m in length, run in opposite directions with a velocity of 40 m/s and 20 m/s respectively. How long will it take for the tail ends of the two trains to meet each other during the course of their journey ?

Ramesh is twice as good a workman as Sunil and finishes a piece of work in 3 hours less than Sunil. In how many hours they together could finish the same piece of work ?

The floor of a rectangular room is 15 m long and 12 m wide. The room is surrounded by a vrandah of width 2 m on all its sides. The area of the vrandah is :

Pratul's monthly income is onefourth of Manoj's monthly income. Manoj's annual income is ` 2.16 lacs. What is Pratul's annual income? (In some cases monthly income and in some cases annual income are used.