RRB NTPC 28 April 2016 Paper

(2) Let n = 5x + 4 [Dividend=divisor× quotient + remainder]
Hence, 2n=10x+8
Dividing by 5, 10x will give remainder 0 and 8 will give remainder 3.
⇒ R = 0 + 3 = 3 [Addition property of remainder]