Let’s find the pattern in the sequence:
7, 15, 31, ?
Notice:
-
7×2+1=157 \times 2 + 1 = 15
-
15×2+1=3115 \times 2 + 1 = 31
So, each term is (previous × 2) + 1.
Therefore,
31×2+1=6331 \times 2 + 1 = 63
✅ The missing number is 63.
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