While solving a problem, by mistake, Anita squared a number and then subtracted 25 from it rather than first subtracting 25 from the number and then squaring it. But she got the right answer. What was the given number? 

In the following questions two equations numbered I and II are given. You have to solve both the equations and ____
I.$$ {7\over \sqrt {x}}+{5\over \sqrt {x}}=\sqrt {x}$$
II.$${y^2 - {12^{5/2}\over \sqrt {y}}}= 0$$
Give answer
(A) x > y
(B) x ≥ y
(C) x < y
(D) x ≤ y
(E) x=y or the relationship cannot be established

S1 can do a piece of work alone in 9 days, S2 can do the same work alone in 18 days, while S3 can do it alone in 27 days. They work together and complete the work, and receive a total of ₹ 726 as payment for doing the work. What is the combined share of S2 and S3, taken together from the above amount?

A field roller, in the shape of a cylinder, has a diameter of 1 meter and length of $$ {1}{1\over4}$$ meter. If the speed at which the roller rolls is 14 revolutions per minute, then the maximum area ( in m²) that it can roll in 1 hour is:

A train passes a 100 meters long platform in 28 seconds and a man standing on the platform in 20 seconds. The speed of the train is:

PA and PB are two tangents to a circle with center o from a point P outside the circle. A and B are points on the circle. If ∠OAB = 35° than ∠APB is equal to: 

The lateral surface area of a cylinder is 792cm². If its height is 14cm, then its volume (in cm³) is? [Take π = 22/7 ]

What is the approximate value will come in place of the question mark(?) in the following questions?