Find the missing number in the following series: 7, 14, 30, 62, 126, ....?
- 254
- 255
- 256
- None of these
Explanation
Check the pattern between the numbers:
14 = 7 x 2 + 0
30 = 14 x 2 + 2
62 = 30 x 2 + 2
126 = 62 x 2 + 2
From 14 onwards, the rule is: multiply by 2 and add 2
Now apply the same rule to find the next number:
Next number = 126 x 2 + 2
Next number = 252 + 2
Next number = 254
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