P is 4 years older to Q. Q is 7 years younger to R. R is 5 years older to S. S is 8 years younger to T. Who is the youngest?
Let T's age = $$20$$ years
=> S's age = $$20-8=12$$ years
=> R's age = $$12+5=17$$ years
=> Q's age = $$17-7=10$$ years
=> P's age = $$10+4=14$$ years
$$\therefore$$Â Q is the youngest.
=> Ans - (B)
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