Find the missing number?

In a row of 36 boys, who are facing north, P is eighth from the right end and there are seven children between L and P. What is L's position from the left end of the row?

Arrange the following words according to the dictionary.
(1) Rebellion
(2) Rebel
(3) Recalcitrant
(4) Rebound
(5) Rebook

Which two signs should be interchanged to make the given equation correct?
20+5×3÷3-1=14

Directions: In the following question four words have been given, out of which three are alike in some manner and the for one is different. Choose out the odd one.

Arrange the following words as per order in the dictionary
1. Organ
2. Origin
3. Orient
4. Organic
5. Organise

A series is given, with one term missing. Choose the correct alternative from the given options that will complete the series.
51    (?)    57      65      81    

In the following question, select the related letters from the given alternatives.
AB : LM : : NO : ?