Answer-After 3 years, S’s age will be?

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We have Age of T is 46 years and likes Toshiba, that means T was born in 1972.  The difference of age of T and V is 12 years, that means we have two possible year for V, in case 1 V was born in 1984, in case 2 V was born in 1960.  Ss age is equal to the last two digit of birth year of V, that means in case 1 age of S must be either 48 or 84 year but 84 is not valid as no person was born before 1950 thus as S was born in 1970, in case 2 age of S must be either 06 or 60 year but 06 is not valid as no person was born after 2004 thus as S was born in 1958 and S likes HP. Based on above given information we have  Again, we have The difference of age of X and S is 6 years, that means we have four possible birth year for X, in case 1a X was born in 1964, in case 1b X was born in 1976, in case 2a X was born in 1952, in case 2b X was born in 1964.  Rs age is equal to the last two digit of birth year of X, that means in case 1a case 2b possible age of R is either 64 or 46 years, as T was born in 1972 thus R must born in 1954, in case 1b possible age of R is either 67 or 76 years, as no person was born before 1950 thus R must born in 1951, in case 2a possible age of R is either 52 or 25 years, as R was not born after 1965, that means case 2a is not valid. Based on above given information we have   Case 2a is not valid as R was not born after 1965. Again, we have The difference of age of one who likes Apple and R is 28 years and W likes Apple, that means in case 1a  2b W must born in 1982, in case 1b W must born in 1979.  One who was born in 1978 likes ASUS, that means U was born in 1978. As W and U was not born on adjacent years, that means case 1b is not valid. Difference of age of one who likes Lenovo and one who likes HP is 16 years, that means in case 1a R must likes Lenovo and S was born in 1970, case 2b is not valid.  One who likes DELL was born after 1972, that means V must likes DELL. Based on above given information we have final arrangement as follow  Case 1b is not valid as W and U was not born on adjacent years and case 2b is not valid as Difference of age of one who likes Lenovo and one who likes HP is 16 years. So final is case-1a

After 3 years, S’s age will

Solution