Question
If 25 : x :: x : 36, and x > 0, then what is the value of x?
This question was previously asked in
RRB NTPC 2024 Undergraduate CBT 1 Question Paper (29-Aug-2025) (Shift 1)
The correct answer is
30
The correct answer is Option 1 i.e. 30.
25 : x :: x : 36
⇒ 25/x = x/36
⇒ x2 = 25 × 36
⇒ x = 5 × 6
⇒ x = 30
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