Let us assume the present ages of son be Y then his father present age will be Y + 34 years. then
12 years ago, father's age = Y + 34 -12
12 years ago, Son's age = Y - 12
Now according to question,
12 years ago, father's age was 18 times the age of his son. then
18( Y - 12 ) = Y + 34 - 12
? 18Y - 216 = Y + 22
? 17Y = 238
? Y = 14
Hence, present age of his son = 14 years.
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All others are one less then the cube of a number.
Except white all are the colours of the rainbow.
All others are stationery.
As, 'Picture' is related to 'See' similarly the Book is related to 'read'.
Both I and II will help increases the population of dolphins.
All others are diffrent from of coocking.
9157592
All others are birds while bat is a mammal.
So, 654 is wrong and must be replaced by (218 x 3 - 4) i.e. 650.
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