| How many 1's are there in the following sequence which are immediately preceded by 9 but not immediately following by7? |
| 719117189171213145713917 |
A) One
B) Two
C) Three
D) Four
Correct Answer: A
Solution :
7 1 [9 11] 71 8 9 1 7 1 2 1 3 1 4 5 7 1 3 9 1 7
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