Quantitative Aptitude - Arithmetic Ability Questions

By what least number should 1200 be multiplied so that it becomes a perfect square?

If X + 2Y = 27 and X - 2Y = -1, find the value of Y.

Which pair is not similar to the other three?

At what point does the line 3x + y = -6 intercept the x-axis?

Two circles with centres P and Q touch each other externally. A straight line drawn through the point of contact intersects the circle with centre P at A and the circle with centre Q at B. Then, which of the following is true?

The radius of a wire is decreased to one-third. If volume remains the same, length will increase by

A cylindrical vessel of radius 7 cm is partially filled with water. By how much will the water level rise if a sphere of radius 6 cm is completely immersed in this water?

The volume of a hemisphere is 5749.33 cm³. Find its diameter (in cm).