Answers

  • Brainly User
2014-05-01T12:48:24+05:30
It could be 4 as 1,4,9,7     ,7,9,4,1
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2014-05-01T13:04:26+05:30
The number must be 4 and then 1. So that the series becomes 1, 4, 9, 7, 7, 9, 4, 1
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