Find the Next Number in the series!
1, 3, 7, 15, 31, 63, 127, _____
Give explanation to your answers!
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Brain teaser # 7
Replies (4)
Answer is 255......
Explanation:
1x2 + 1 = 3
3x2 + 1 = 7
7x2 + 1 = 15
.
.
127x2 + 1 = 255.......
255
| series | difference between next term | |
| 1 | ||
| 3 | 2 | gets double |
| 7 | 4 | gets double |
| 15 | 8 | gets double |
| 31 | 16 | gets double |
| 63 | 32 | gets double |
| 127 | 64 | gets double |
| 255 | 128 | gets double |
255
series differences get doubled in every step.
Hey Guys....You all got it correct !!
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