If A + B means A is the brother of B; A - B means A is the sister of B and A x B means A is the father of B. Which of the following means that C is the son of M?

Find the missing number?

Select the set in which the numbers are related in the same way as are the numbers of the following set.
(9, 35, 16)

In a certain language, MADRAS  is coded as NBESBT, how is BOMBAY coded in that language?

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? 

If you write down all the numbers from 1 to 99, then how many times do you write 3?

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?