For the following questions answer them individually
If the top of a 15 meter high tower makes an angle of depression of $$60^{circ}$$ with the bottom of an electric pole and an angle of depression of $$30^{circ}$$ with the top of the pole, then the height (in meters) of that electric pole is
If $$\left(3a-\frac{1}{b}\right)^{2}-8\left(3a-\frac{1}{b}\right)+16+\left(c+\frac{1}{b}-2a\right)\left(3a-\frac{1}{b}-4\right)=0$$, then
A polynomial in $$x$$ leaves remainder -1 and 7, when it is divided by $$(x+ 1)$$ and $$(x - 3)$$ respectively. If the same polynomial is divided by $$x^{2} - 2x - 3$$ then the remainder is
If the remainder when the polynomial $$7x^{3} - 8x^{2} + 9x - 10$$ is divided by $$x^{2} - x - 2$$ is $$ax + b$$, then a + b =
A person has Rs.10 and Rs.20 notes in his purse. Total number of notes is 37. Total amount is Rs.510. Then the difference between the number of Rs.10 notes and Rs.20 notes is
Five pens and six pencils cost Rs.28. Six pens and five pencils cost Rs.27. Now the cost (in Rupees) of each pen and each pencil respectively?
If the $$5^{th}$$ term of a Geometric Progression is 7, then the product of the first 9 terms is
If $$C_{0}, C_{1}, C_{2}, ... C_{n}$$, are binominal co-efficients of $$(1+x)^{n}=$$ then $$C_{0} - C_{1} + C_{2} + ... + C_{n}(-1)^{n}$$