Fill in the blank space for the given series with the correct alternative.
$2, 6, 12, 20, 30, 42, 56, (\dots)$

Fill in the blank space for the given series with the correct alternative.
$(2,3), (3,5), (5,7), (7,11), (11,13), (\ldots)$

Study the following arrangement carefully and answer the question given below:
$R, 4, E, J, 5, T, 1, A, M, Q, 3, 8, N, I, K, 7, W, F, 6, D, 9, U, 2, Y, V$
Which of the following is the fourth to the right of the tenth from the right end of the above arrangement?

The following questions are based on the five three-digit numbers given below:
$972, 526, 487, 359, 251$
If the positions of the first and second digits are interchanged,which of the following will be third if they are arranged in ascending order?

The following questions are based on the five three-digit numbers given below:
$972, 526, 487, 359, 251$
If the digits in each of the above numbers are written in reverse order,which will be the second highest number?

Fill in the blank space for the given series with the correct alternative.
$5, 16, 13, 26, 29, 58, 61, (\dots)$