Puzzle 1
Last week I travelled from London to Leeds, a distance I measured as 174 miles.
I started at 9.15am and completed the journey with an average speed of 40 miles per hour.
On the way back, in the evening, I travelled exactly the same route, starting at 5.15pm. The traffic was light, and I completed the journey with an average speed of 60 miles per hour.
What was the overall average speed for the round trip?
The answer is not 50 mph.
Puzzle 2
What four-letter word can be placed between the two following words to make two new words:
table[----]house
In the following example, the word 'book' creates the words 'cookbook' and 'bookcase'.
cook[book]case
Puzzle 4
This is an annoying paragraph, in which you try to work out what is unusual about it. This paragraph has a quandary though. A solitary word has found a way to slink into this paragraph, to fox your fun, by going against all my jazzy plans. What is that word? Don't try to run a utility to assist you, that would spoil all of my attempts to absorb all of your avid skills in this mind-blowing prank.