✍RRB NTPC Reasoning PDF 2025 – गलती से भी ये सवाल मिस मत करना।🎯 Start The Quiz Solve The Mathematical Series 1, 4, 9, 16, ?गणितीय श्रृंखला हल करें 1, 4, 9, 16, ? 60% Note: These are squares of 1, 2, 3, 4, and 5. 20 21 25 30 Back to Top Next Question Pages 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36