For the following questions answer them individually
Two trains P and Q arrived at station X on same day at 14:35 hours and 15:28 hours, running late by 21 minutes and 12 minutes respectively. Then the time difference between their scheduled arrivals (in minutes) is
Six persons A, B, C, D, E and F are sitting around a circular table such that C is sitting to the right of E, and F is to the right of A. If B is sitting to the left of D, and A and C are sitting adjacent to each other, then who is sitting opposite of D?
If the symbols $$\alpha, \beta, \gamma$$ and $$\delta$$ stand for arithmetical operations of addition, subtraction, multiplication and division respectively, then
$$\frac{(42\delta2)\beta(5\gamma4)}{(5\beta4)\alpha(4\delta4)}$$=
If $$a \times b$$ stands for $$\frac{1}{a} + \frac{1}{b}$$, then $$\sum_{n = 1}^{10}\left(1 \times \frac{1}{n}\right) = $$ then
An urn contains 60 litres of mixture of milk and water in the ratio 3 : 1. How many litres of water is to be added to this mixture to make the ratio of milk and water as 1 : 3?
If the arithmetic mean of two surds is $$5 + 9\sqrt{2}$$ and one of them is $$1 + 12\sqrt{2}$$, then the square root of the second surd is