3, 4,7, 7, 15, 13,31, ?
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Answered by
4
Answer:
25
Step by Step Explanation:
This sequence is a combination of 2 patterns.
1st sequence = 3, 7, 15, 31...
2nd sequence = 4, 7, 13...
In the 1st one the pattern is as follows:
3 + 4 = 7
7 + 8 = 15
7 + 16 = 31
We are adding two times the previously added number eg, 4 × 2 = 8 and 8 × 2 = 16
In the 2nd sequence, the pattern is as follows:
4 + 3 = 7
7 + 6 = 13
13 + 12 = 25
In this sequence we are also adding two times the previously added number eg, 3 × 2 = 6 and 6 × 2 = 12.
Hence, the answer is 3, 4, 7, 7, 15, 13, 31, 25
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