Next number in the series 7 ,5 ,9 ,3 ,11 ,1 ,----;
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13
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14
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16
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17
Reveal answer
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A
Correct answer
Explanation
This is an alternating pattern with two interleaved sequences. Odd-positioned terms (1st, 3rd, 5th, ...): 7, 9, 11, ? increase by 2 each time. Even-positioned terms (2nd, 4th, 6th): 5, 3, 1 decrease by 2 each time. Following the odd-positioned pattern: 7+2=9, 9+2=11, so 11+2=13. The answer is 13.
AI explanation
The series interleaves two separate patterns: the odd-position terms increase by 2 (7, 9, 11, ...) and the even-position terms decrease by 2 (5, 3, 1, ...). Since the sequence given is 7, 5, 9, 3, 11, 1, the next term continues the increasing sub-sequence, giving 11 + 2 = 13.