The son of an old man is the uncle of my son. Tell me, what is the relation of the only son of the only daughter of my mother to that old man?

Select the c ombination of letters that when sequentially placed in the blanks of the given series will complete the series.
 _ c _ d d _ c a _ c b d d b _ a

Pointing to a men, women said that he is the son of my mother's brother's father's son. Then find out how is that man related to that woman?

DISTANCE 

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
UNIFORMITY

Directions: Study the following information carefully and answer the questions that follow:

Six persons P, Q, R, S, T and U were born in three different months May, September and November, on two different dates- 9 and 16 not necessarily in the same order. P was born after R but not on the same date as that of R. Number of persons born before S is equal to the number of persons born after T. Q and U were born in the same month. T was born in a month having even number of days. Two persons were born between R and T.

Who was born immediately before R?

Select the word-pair that best represents a similar relationship to the one expressed in the pair of words given below. (The words must be considered as meaningful English words and must not be related to each other based on the number of letters/numbers of consonants/vowels in the word)
 Race : Track

In the following question, two signs and two numbers need to be interchanged to make it correct. Select the appropriate signs and number from the given alternatives.
6 × 8 + 2 = 20