49 : 343 : : 64 : ?

During assembly the students are standing in a line. Salman Khan is 21st in order from both the ends. How many boys are there in the class?

Choose the number missing in the third cross:

Statements: 

Some pens are pencils. 

All pencils are erasers. 

Conclusions: 

I. Some pens are erasers. 

II. No pens are erasers. 

III. Some erasers are pencil 

Rakesh is 6 ranks ahead of Tanvir in a class of 42 students. If Tanvir’s rank is eighteenth from the last, then what is Rakesh’s rank from the start?

In the year 1979 X - mas day was celebrated on Tuesday. When will it be celebrated on same day? 

Direction: In the following question, select the related letters from the given alternatives. 

QDXM : SFYN :: UIOZ : ?