• # question_answer Direction: Find the missing number/alphabet. A) 1 B) 731 C) 1625 D) 2031 E) None of these

Explanation Option (d) is correct. The pattern is $\to$$3\times 5+1=16$ $\to$$16\times 5+1=81$ $\to$$81\times 5+1=406$ $\to$$406\times 5+1=2031$