Question
Of the first
water In the following question, out of the given four alternatives, select the alternative which best expresses the meaning of the Idiom/Phrase.Solution
The phrase comes from a technical term used to describe diamonds. The degree of brilliance in a diamond is called its “water”, so a “diamond of the first water” is an exceptionally fine diamond.
If x = 6 + 2√5, then the value of √x - (1/√x)?
If, 4x + y = 10, and 2xy = 8, and 4x > y, then find the value of 64x³ – y³.
If √n + (1/√n) = 6, then find the value of n + (1/n).
If tan x + cot x  = 7, find  tan3 x + cot3 x = ?
Three cubes of metal whose edges are 3cm, 4cm and 5cm. respectively are melted and a single cube is formed. What is the length of the edge of the newly ...

If x = (2+√3)/(2-√3), y = (2-√3)/(2+√3)
Then find out the value of (x²+y²-xy)/(x²+y²+xy)
If 112 ÷28 x 22 –12 x 6 ÷ 3 +12 = z, then find the value of z.
if 2x +3y =7 and 2x+2 -3y+2 =7, then find the value of x and y.
Find the value x2 + y2, if xy = 13 and x + y = 7.