For the following questions answer them individually
If $$(1 + x)^{10} = a_0 + a_1x + a_2x2 + ...... + a_{10}x^{10}$$ then $$3(a_0 + a_2 + a_4 + .... + a_{10}) - 2(a_1 + a_3 + a_5 + ...... + a_9) =$$
If $$A = \begin{bmatrix}7 & 1 & 5 \\3 & 1 & -2 \\-4 & 3 & 2 \end{bmatrix}, B = \begin{bmatrix}1 & 4 & -6 \\2 & -1 & 5 \\7 & 0 & -3 \end{bmatrix}$$ then the trace of the matrix AB is
If B is a symmetric matrix and C is a skew symmetric matrix of the same order such that B + C = A then C =
If the area of an equilateral triangle is $$25\sqrt{3}$$ sq.cm, then its perimeter (in cm) is
If the length of the diagonals of a Rhombus are 48 cm and 14 cm, then its perimeter (in cm) is
If an arc of a circle of radius 21 cm subtends an angle $$60^{\circ}$$ at the centre of the circle, then the length of that arc (in cms) is (take $$\pi = \frac{22}{7}$$)
The ratio in which the point ( 1, -1) divides the line segment joining the points (-2, -8) and (7, 13) is
If (2, 3), ( 4, -5), (-1, 7) and (-8, -10) are consecutive vertices of a quadrilateral, then the product of the lengths of its diagonals is