Discussion
How many 7’s are there in the following series which are not immediately followed by 3 but immediately preceded by 8?
8 9 8 7 6 2 2 6 3 2 6 9 7 3 2 8 7 2 7 7 8 7 3 7 7 9 4
Answer: C
Correct answer: 2
Two 7s have an 8 immediately before them and something other than 3 after them: 8 7 6 and 8 7 2. The 7 in 8 7 3 is ruled out by the 3 that follows. So there are 2.
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