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Seat couples

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Black and White Sheep

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A Simple & Crappy Clock

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Find the peak entry

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Determine the original word from relationships between letters

If the girlfriends of 3 couples are seated in fixed position around a table,

there is only one possible way to seat their boyfriends so that men and

women alternate ...

Tags: brainteaser permutation

A field contains a number of stationary black and white sheep. What simple condition will guarantee that a straight wire will exist which will separate the black sheep from the ...

Tags: classification

How many times a day is it impossible to tell the time by a clock with identical hour and minute hands, provided we can always tell whether it is a.m. ...

Given an array A with n distinct entries, for some index p between 1 and n, the values in the array entries increase up to position p in A and ...

Tags: algorithm divide-and-conquer

You are given a list of relationships between the letters in a single word, all of which are in the form: "The first occurrence of A comes before N occurrences ...