Solve the given equation by replacing the question mark "?" with the most appropriate option:

$16^2 + 8^2 - 16 * 8 = \ ?$

If each term of a geometric progression (GP) is positive and is the sum of two preceding terms, then the common ratio of the GP is:

In an arithmetic progression, if 6 is the third term, the ninth term exceeds the seventh term by 3, then 12 is which term?

Which of the following list of numbers forms an arithmetic progression?

(A) 1, -1,-3 -5, .......

(B) -1.2, -3.2, -5.2, -7.2, ...........

(C) -2, 2, -2, 2, -2, ........

(D) 2, $\frac{5}{2}$, 3, $\frac{7}{2}$ ......

Choose the correct answer from the options given below:

If the 5th and 9th terms of an arithmetic progression are 7 and 13, respectively, then the 15th term is:

In arithmetic progression(A.P.), the first term is 7 and the 6th term is 22. The sum of the first 10 terms of A.P. is:

The sum of n terms of the series

$1 + \frac{3}{2} + 2 + \frac{5}{2} + 3 + \frac{7}{2} + ...$