Answer to Riddle 55 - Lots of Change but No Dollar...?

$1.19 - 3 quarters, 4 dimes, and 4 pennies.

Answer to Riddle 56 - How Long the Goat Will Take...?

What did you say - 60 minutes? Oh, No, it will take only 58 minutes to reach at the top of the cliff. Why? Although his net progress each minute is one foot, still it reaches at the top of the cliff on the 58th minute - just before it would normally slip back two feet.
 

Answer to Riddle 57 - Apples and Oranges

Take a piece of fruit from the box marked "Apples and Oranges." Suppose the fruit you take is an apple. Then that box must be the box containing just apples - because remember, all the boxes are marked wrong. So the box marked "oranges" can't be the box containing just apples, and it can't be the box containing just oranges either -- so it must be the box containing apples and oranges. The remaining box is therefore the box containing just oranges.

If the fruit you take out is an orange, the solution is derived in a similar fashion: the box marked "apples and oranges" is the box containing just oranges; the box marked "apples" is the box containing both apples and oranges; and the box marked "oranges" is the one containing just apples.

Answer to Riddle 58 - Race of Camels

The rule of the race was that the owner of the camel that crosses the finish line last wins the fortune. The wise man simply told them to switch camels.

Answer to Riddle 59 - How to Cross the River...?
He should first take the chicken across and leave it on the other side. Then come back to get the fox and bring it to the other side of the river and take the chicken back with him and leave him there. Then he will take the grain to the other side and leave it there. Then he will go back and get the chicken to the other side of the river.

Answer to Riddle 60 - Finding the Heavier Doughnut?

Two. Weigh three doughnuts against three other doughnuts and leave the remaining two on the table. If the scales are even, the heavy doughnut is one of the two on the table -- weigh them to find out the heavier doughnut. If the scales are uneven, take the three doughnuts on the heavier side (leave the other 3 lighter doughnuts on the table) and weigh one of them against another, and leave the third one aside. If the scales are uneven, you've found the heavy one. If not, the heavy one is the one on the table.

Answer to Riddle 61 - Where Did the One Dollar Go?

The mistake is in how the 30 Dollars are accounted for. The 2 Dollars that the bellboy has are part of the 27 Dollars the men have paid. A correct accounting of the money is that only 27 dollars were paid and 3 dollars were not paid, totaling 30 dollars.

Answer to Riddle 62 - How Can an Older Twin Celebrates Birthday Later?

The boy, the older twin, was born early on March 1st. Then the boat crossed the International Date Line to the west, and the girl was born on February 28th. In a leap year, the younger twin celebrates her birthday two days earlier than her older brother.