This problem is said to have appeared in Google's entrance exam.

Problem:

1

1 1

2 1

1 2 1 1

1 1 1 2 2 1

what is the next line ? [S]

## Thursday, August 24, 2006

## Friday, August 18, 2006

### Colouring Problem

Problem : Six sides of a die are painted with six different colours.In how many ways can this be done ?

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See comment for clue

Labels:
enumerative combinatorics

### Divsion problem[S]

Problem : find the maximum value of 'n' such that 18^n divides 181!

See comment for clue[S]

See comment for clue[S]

Labels:
general

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