Puzzle 1
What comes next in this sequence:
dog · goat · tarantula · aardvark · koala · ?
Choose from:
cat, mouse, antelope, elephant, frog
Puzzle 2
Starting with COLD, change one letter at a time until you have the word WARM.
Each change leaves the other letters in their original places and must result in a common word.
What is the minimum number of steps required to achieve this change?
Puzzle 3
How many days before 17th August is it, if …
… 50 days before then, it was four times as many days since March 30th?
Puzzle 4
Kevin wants to go and see his brother, who lives across the valley, and he wants to take his three pets with him, a dog, a cat, and a mouse.
However, the shortest way to his brother's house involves a river crossing, and Kevin only has a very small boat that can carry him and just one of his pets.
He doesn't want to leave the dog alone with the cat, nor does he want to leave the cat alone with the mouse. However, the dog and mouse are great friends.
How can Kevin cross the river to see his brother, and make sure his pets are all happy?