8 years ago, the average age of a family of six persons was 50 years. In between these 8 years the family adopted a girl. Now at present the average age of the family is same as it was 8 years ago. Find the present age of the girl.
Sum of the present age of the family excluding girl = 6 x (50 + 8) = 348 years Sum of the present age of the family including girl = 7 x 50 = 350 years Present age of the girl = 350 – 348 = 2 years
If x = 6 + 2√5, then the value of √x - (1/√x)?
If for non-zero x, x² - 4x - 1 = 0, what is the value of x² + 1/x²?
√(92×8 ×52+700) = ?
If x, y and z are real numbers such that (x-5)2+(y-8)2+(z-12)2= 0 then (x+y+z) is equal to
If 1/(x+ 1/(y+ 1/z)) = 13/30, then find x+y+z= ?
If [8(x + y)3 – 27(x – y)3] ÷ (5y – x) = Ax2 + Bxy + Cy2, then the value of (A2 - 2B + 3C)...
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If (x 3/2 - x.y 1/2 + x 1/2 .y-y 3/2 ) is divided by (x 1/2 -y 1/2...
Find the value of ‘x’ in the given expression
(49/16)x× (64/343)x-1= 4/7
