55:11

[18] Ratio & Proportion -2 | RRB NTPC Maths Free | Devotion Institute| Mahendra Khandelwal

1:50:40

[21] Square Root | Number System – 1 | RRB NTPC Maths Free | Devotion Institute

1:22:44

[32] Ranking Test | RRB NTPC Reasoning | Devotion Institute | Mahendra Khandelwal

1:49:44

Ratio & Proportion (अनुपात और समानुपात) || Best Concept/Problems/Tricks/Method || KTC || By Kd. Sir

1:44:31

Ratio & Proportion Basic Concepts | Zero to Hero Maths by Shantanu Sir

1:04:20

Railway Exams 2024 |Maths-Proportion (समानुपात) | All Types of Questions in One Video | by Sahil sir

1:04:15

Ratio and Proportion #1 | Maths | Railway NTPC & Group D Special Classes | By Mahendra Sir |

1:00:02

[26] Simplification -1 | Number System -9| RRB NTPC Maths Free | Devotion Institute