The man keeps ducks.

Sunday.

The snail will get to the top of the well in 18 days. It progresses at the rate of only one metre a day for 17 days and covers the last three metres reaching the top on the 18th day.

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The two children row to the opposite shore and one gets out. The other child brings the boat back and gets out. One soldier then rows accross to the opposite bank and gets out. The second child returns with the boat. Thus it takes four crossings to get one soldier across and to bring the boat back. In total it takes 1432 journeys (4 x 358), to get the officer and his 357 soldiers acorss the river leaving the children in joint possession of their boat.

It will take the rabbits two hours. The small rabbit digs 0.1111 warren per hour (1 ÷ 9). The medium rabbit digs 0.1666 warren per hour (1 ÷ 6). The large rabbit digs 0.2222 warren per hour (1 ÷ 4.5). Adding these three values together will give you a figure of 0.4999 warren per hour. 1 ÷ 0.4999 = 2 hours.

The traveller asked 'which road goes to your village?'. From the response the traveller would then take the road the villager pointed to. This is because a truthful person would point towards the truthful village and a liar would also point toward the truthful village, since he is a liar and therefore could not point to his own village.

The maths student turned over both hourglasses. When the four minute glass ran out, she turned it over again - four minutes had elapsed. When the seven minute glass had run out, she also turned it over again - seven minutes had elapsed. When the four minute glass ran out for the second time - eight minutes had elapsed. At this point the seven minute glass had been running for one minute. The student turned it over once again. When it stopped, nine minutes had elapsed.

The solution is that there is no missing dollars. Adding $27 and $2 to get $29 is the worng calculation. The diners paid $30 and received a $3 refund making a total of $27. $25 went to the management and $2 to the waiters pocket. There never was $29.

The man takes the cat across the river and goes back to get the mouse. the man then takes the mouse accross and returns with the cat. He leaves the cat on the bank and takes the dog across, leaving the dog with the mouse on the opposite side. Finally the man returns to egt the cat.