Verbal Reasoning - Mental Ability Questions

The last two digits of 2151415?

In following question, a number series is given with one term missing. Choose the correct alternative for these sequence.

24, 60, 120, 210, ?

In the following question, various terms of an alphanumerical series are given with one or more terms missing as shown by (?). Choose the missing terms out of the given alternatives. 3F, 6G, 11I, 18L, ?

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

If the first half of the given alphabets are written in reverse order which letter should be 8th letter to the left of 14th letter from the right?

If Kamal says, ellavi's mother is the only daughter of my mother", how is Kamal related to Ravi  

A bus for Shiridi leaves after every fifty two minutes from a bus stand. An enquiry officer told a passenger that the bus had already left sixteen minutes ago and the next bus will leave at 08:15 p.m. At what time did the enquiry officer give the information to the passenger?

If "K" means "subtracted from", "L" means "divided by", "M" means "added to" and "D" means "multiplied by", then 96 L 4 K 6 M 11 D 9= ?

If the letters of the word OBSERVANT are interchanged, such that the first becomes ninth, second becomes eighth and so on, and the position of the fifth letter remains unchanged then what will be the new arrangement of letters?