Tag Archives: puzzle

The Truel

Three men insult each otherâ€™s honour. They decide to settle the matter like gentleman: pistols. The pistols are single shot; and each man gets one shot. The problem is that there are three of them, not two, so this is a truel not a duel. Their respective skills with a pistol are not equal; Mr… Read More »

Child Gender Ratios

Thereâ€™s a country where everybody wants to have a son. Therefore each couple keeps having children until they have a boy; then they stop. What fraction of the population is female? (You may assume the question is asked as an expectation of course, since any particular country can be anything in principle â€” 100% girls… Read More »

Weights and Measures

You have a set of balance scales and some weights. You need to be able to measure every whole number weight from 1 to 40 kilograms of (say) flour. What is the smallest number of weights you need and what are their values? The first trick is of course that you can put weights on… Read More »