3 25 173 1041 5201 20809
15 a b c d e
What would come in place of b?
The above series go in the following sequence. 3 `xx` 8 + 1 = 25 25 `xx` 7 – 2 = 173 173 `xx` 6 + 3 = 1041 1041 `xx5` – 4 = 5201 5201`xx` 4 + 5 = 20809 Hence, the resulting series would be: 15 121 845 5073 25361 101449