Discussion
In the following series of numbers, howmany 1, 3, 7 have appeared together. 7 being in middle and 1, 3 on either side of ??
2 9 7 3 1 7 3 7 7 1 3 3 1 7 3 8 5 7 1 3 7 7 1 7 3 9 0 6
Answer: C
Correct answer: 3
We want a 7 with a 1 on one side and a 3 on the other. Three such groups occur - the 1 7 3 at the fifth to seventh places, the 1 7 3 at the thirteenth to fifteenth, and the 1 7 3 at the twenty-third to twenty-fifth. So the answer is 3.
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