Amit's age is equal to that of Summit as they are twins. Richa is younger than Summit. Richa is younger than Jyotsna but elder than Saurabh. Summit is younger than Jyotsna. Who is the oldest of them all?
According to the question,
Amit = Sumit ...(i)
(A) (S)
Richa < Sumit ...(ii)
(R) (S)
Saurabh < Richa < Jyotsna
(Sa) (R) (J) . . . (iv)
Combining all the statements we get
Sa < R < S = A < J
Therefoer Jyotsna is the oldest.