In the following question, Select the related letter/word/ number...

The given question is $45: 40: 36: ?$ To answer this question you have to find the relation between the given numbers. Depending upon that given pattern we have to calculate the missing term of the series. By analyzing the given numbers we can say that first, we have to multiply the digits of the given number, and then the result is multiplied by 2 . Therefore, $$\begin{aligned} & 45=(4 \times 5) \times 2=40 \\ & 36=(3 \times 6) \times 2=36 \end{aligned}$$ So, the next number is 36 . Hence, this is the correct answer.