railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Simplification Surds and Indices
যদি \({\left( {\frac{{512}}{{125}}} \right)^3} \times {\left( {\frac{{512}}{{125}}} \right)^k} = {\left( {\frac{8}{5}} \right)^{15}} \) হয়, তাহলে k এর মান হবে:
1
3
2
2
3
-1
4
-2