For the following questions answer them individually
After spending 30% of his salary, a man had Rs.2100 left. From the remaining amount, he spent 15% on minor repairs. What are his savings?
Find the value of $$Â tan^2 60^\circ - 2 tan^2 45^\circ - cot^2 30^\circ + 2 sin^2 30^\circ + 3/4 cosec^2 45^\circ $$
In a two-digit number, the digit in the unit's place is four times the digit in ten's place and sum of the digits is equal to 10. Find the number.
The amount of the solute present in the saturated solution at a particular temperature is called its-
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