Directions: In each of the following questions, find out which of the letter series follows the given rule.
Number of letters skipped in between adjacent letters in the series is two. 

If 6 @ 4 @ 7 = 101 and 2 @ 5 @ 11 = 150, then what is the value of A in A @ 8 @ 9 = 289?

Renu walks 5 km towards south then she turns towards her left and walks 5 km and then she turns towards here right and walks 7 km, now she turns towards her right and walk 5 km and finally take a left turn and walks 4 km and stops. How far and in which direction is she from her original position?

In a class, there are 80 students who study both Computer Science and Electronics. While 100 students study Computer Science, 120 Students study Electronics, How many of them study Computer Science only? 

In a row of girls, Kamya is 5th from the left and Preeti is sixth from right. When they exchange their position, then Kamya becomes 13th from the left. What is the new position of Preeti from right?

In the following question, select the related word from the given alternatives.
Triangle: Hexagon:: ?

Which of the following calendar years is similar to the calendar of the year 2003?

Radhika went 50 metres south from her house then turned left and went 20 metres then turning , to north she went 30 metres. In which direction is her home from this point?