Question
A and B started a retail store with initial investments
in the ratio 8:9 and their annual profits were in the ratio 2:3. If A invested the money for 6 months, then for how many months did B invest his money?ÂSolution
Suppose A invested Rs. 8x for 6 months and B invested 9x for y months then, ⇒  (8x × 6)/(9x × y) = 2/3 ⇒  y = (48x × 3)/(9x × 2) ⇒  y = 144x/18x ⇒  y = 8
((99.9 - 20.9)² + (99.9 + 20.9)² )/(99.9 x 99.9 + 20.9 x 20.9) = ?
...If √b + (1/√b) = 8, then find the value of b + (1/b).
Solve for x:
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If √z + (1/√z) = 14, then find the value of z + (1/z).
In a best-of-two chess match between Player X and Player Y, the probability that Player X wins a game is (5/9), and the probability that Player Y loses ...
If p = 33 - q - r and pq + r(q + p) = 260, then find the value of (p² + q² + r²).
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