Find the missing number?

Which numbers replace the question mark

In the following question, select the number which can be placed at the sign of question mark (?) from the given alternatives.

Your mother is 4 years younger than your father and your father is 6 times older than you. If you are 6 years old, what is your mother's age?

What was the day of the week on 17th June, 1998?

Which of the following group represents all such Scientists who are Government employees as well as employed with Company X?

Samuel is eighth shortest in a class of 26 students. What will be his position if counted from the tallest in the class?

In a class of 26 students, 14 have cats, 10 have dogs and 5 have parrots. If 4 have dogs and cats, 1 has dog and parrot, 3 have parrots and cats and no one has all the three. How many have none?