Fill in the blank space for the given series with the correct alternative.
$11, 12, 17, 18, 23, 24, (\ldots)$

Fill in the blank space for the given series with the correct alternative.
$3, 10, 20, 33, 49, 68, (\ldots)$

Study carefully the following arrangement of letters, digits and symbols to answer these

questions.

$M, 7 ,\&, 8, L ,P ,@ ,Q ,N ,\beta ,T ,Y ,3 ,2 ,= ,E ,\$ ,4 ,9 ,\#, G ,H ,5$

How many such symbols are there in the arrangement each of which is immediately preceded by a number?

Which term comes next in the sequence: $nd, iy, dt, yo, tj, ?$

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?

Which term will replace the question mark in the series:
$ABD, DGK, HMS, MTB, SBL, ?$