????=30 Fill the boxes using (1, 3, 5, 7, 9, 11, 13, 15) U can also repeat the numbers. This question came in UPSC Final Exams held in Dec 2013. You will be glad to note that only Gaurav Agarwal (IAS Topper) could

$We\;can\;not\;do\;this\;just\;by\;using\;+\;operator\\* you\;can\;answer\;this\;question\;in\;many\;ways\;using\;the\;factorial\; function.\\*3!+3!+3!+3!+3!=30\\*3!+1+3+9+11=30\\*1+5+7+3!+11=30\\* 3!+3!+3!+11+1=30\\*3!+3!+11+5+1=30\\*11+1+1+3!+11=30\\*15+3+3+3+ 3!=30\\*13+1+1+9+3!=30\\*13+1+3+7+3!=30\\*13+5+3+3+3!=30\\*$

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