## Question

**Find the missing number? 1, 2, 3, 10, ?, 9802 **

A. 99

B. 199

C. 299

D. 999

#### Answer: A. 99

**Solution:**

2 = 1^{2} + 1

3 = 2^{2} − 1

10 = 3^{2} + 1

Now 10^{2} − 1 = 99

9802 = 99^{2} + 1

Hence, The answer is **99.**

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