Two students appeared for an examination. One of them secured 9 marks more than the other and his marks were 56 % of the sum of their marks. The marks obtained by them are 

The area  of a circle is 616 sq cm, find its circumference?

The radius of a circle is 14 cm. what is area of another circle having radius 1.5 times the actual circle?

Direction: In the following questions two equations numbered I and II are given. You have to solve both the equations and give answer.
(A) x>y
(B) x≥y
(C) x˂y
(D) x≤y
(E) x=y or the relations ship cannot be established

I.x³-371 = 629
II.y³ - 543 = 788 

O is the incentre of ∆ABC and ∠A = 30° then ∠BOC is

Lal Babu and Mangallu can finish a work in 10 days while Lal Babu alone can finish that work in 15 days, then how many days will Mangallu take to do that work?

A boat can row 15 km per hour downstream and 9 km per hour upstream. The speed (in km/hour) of the boat in still water is:

At what simple rate of interest a sum is double in 8 years?