[31] 3, 7, 15, ?, 63, 127

For Competitive Exams

10th CBSE Maths

3, 7, 15, ?, 63, 127

30

31

47

52

Explanation:
Each number in the series is one more than twice the preceding number.So, missing term = (15 x 2) + 1 = 31.

Additional Questions

121, 143, 165, 186, 209	Answer
6, 15, 35, 77, 165, 221	Answer
8, 13, 21, 32, 47, 63, 83	Answer
1, 2, 4, 8, 16, 32, 64, 96	Answer
3, 4, 10, 32, 136, 685, 4116	Answer
105, 85, 60, 30, 0, – 45, – 90	Answer
2, 5, 10, 17, 26, 37, 50, 64	Answer
125, 126, 124, 127, 123, 129	Answer
2, 5, 10, 50, 500, 5000	Answer
1,3,12,25,48	Answer

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