List of practice Questions

If \(\frac{x}{(b + c)(b + c - 2a)} = \frac{y}{(c - a)(c + a - 2b)} = \frac{z}{(a - b)(a + b - 2c)}\), then the value of \(x + y + z\) is:
Given expression:
\(\frac{(0.682)^2-(0.318)^2}{0.682-0.318}\)
Among P, Q, R, S, T, each having different weight. R is heavier than only P and S is lighter than Q and heavier than T. Who among them is the heaviest?
\(\frac{(3+7)\times2-4}{(3+7)\times(2-4) }+\frac{3+7\times2-5}{3+7\times(2-5)}\)