Question
Find the missing number? 1, 2, 3, 10, ?, 9802
A. 99
B. 199
C. 299
D. 999
Answer: A. 99
Solution:
2 = 12 + 1
3 = 22 − 1
10 = 32 + 1
Now 102 − 1 = 99
9802 = 992 + 1
Hence, The answer is 99.
Read more:
Find the wrong number in the series. 1, 2, 6, 15, 31, 56, 91