# Nice brain teaser

1. Feb 11, 2009

### math_04

1,8,15,22,29,36,...............

49,343,2401,.............

77,74,71,68,65,.............

What do all these sequences have in common?

2. Feb 11, 2009

### Rogerio

The digit 1

3. Feb 11, 2009

### DaveC426913

Well, they're all simple sequences...

n=(n-1)+7
n=(n-1)x7
n=(n-1)-3

4. Feb 12, 2009

### davee123

- All of the numbers in the sequences are integers.
- If you concatenate the digits of the sequences, each one has the digits "201".
- Each sequence's odd-numbered entries are odd.
- If you concatenate the digits of each sequence, and add the 25th through 35th digits, you'll get the same total, 42.

DaveE

5. Feb 13, 2009

### neu

The number 7?

6. Feb 13, 2009

### DaveC426913

sigh.

Commas, ellipses and integers.

math_04: we've given answers that have met the criteria. Either grant us a win or tell us there's a better answer than the ones we've provided.

7. Feb 14, 2009

### dawnzky05

I guess its the number seven and the digits being integers. Am I getting the right answer to the teasers?

------------------