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How much is $ 10.00 times $ 10.00? Challenge 65
How many men need to leave the room? Challenge 66
The Dog and the Hare Challenge 69
Scale and almonds Challenge 70
How many ways? Challenge 72
Represent the numbers 2 through 9 Challenge 73
Number 6 with 3 equal digits Challenge 78
Cooking the Egg Challenge 79
The children of the couple Aguiar Challenge 81
Surprise at the restaurant Challenge 82
The Farmer's Puzzle Challenge 88
Forming the Number 100 Challenge 90
Wolf, Ram, and Cabbage Challenge 91
Paulo Cesar's Donkeys Challenge 92
Reducing prisoners' penalties Continues after advertising Challenge 94
Northeastern barbecue seller Challenge 95
Mother, Daughters, and Apples Challenge 97
The Bookcase and Scale Challenge 99
The Journey From Pancho Villa Challenge 100
The king and the slaves Challenge 102
Serginho crossing the bridge Challenge 104
Clodovando's father and grandfather Challenge 111
Birthdays and Probability Challenge 113
Orlaneide and the Animals Challenge 115
Half Thirteen Challenge 116
Digging a Hole Challenge 117
The Fly and the Cyclist Challenge 118
Dividing the Camels Challenge 123
Grandfather younger than father? Challenge 125
How many single men are there?