Find the missing number from the given options: 
A, B, C, D, E and F are cousins. No two cousins are of the same age, but all have birthdays on the same date. The youngest is 17 years old and the oldest, E, is 22 years old. F is somewhere between B and D in age. A is older than B; C is older than D. Which of the following is not possible?
Two faces of a cube are given below, which number is opposite of 3?
What is 'X' in the following table?
Find the letter to be placed in '?' 