Test Preparation on Mathematics Olympiad Class-8 Test Prep-10

In the following question, select the missing number from the given series.
13, 24, 37, 61, 98, ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
CDH, FGK, IJN, ?

Which word will appear first when arranged in order of dictionary?

In the following question, select the odd word pair from the given alternatives.

Prerna walks 15 km towards north. She turns right and walks another 15 km. She turns right and walks another 15 km. In which direction is she from her starting point?