## Question

`What is the next number in this series: 2, 6, 15, 40, 145, `*_*?

`What is the next number in this series: 2, 6, 15, 40, 145, `*_*?

A. 236

B. 345

C. 756

D. 456

**Answer: C. 756**

**Solution:**

1! + 1^2 = 2,

2! + 2^2 = 6,

3! + 3^2 = 15,

4! + 4^2 = 40,

5! + 5^2 = 145,

So, **6! + 6^2 = 756.**

**Hence, the answer is 756.**

**Read more:**

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