Puzzle 1
For each of these words, using only the letters of that word, what is the longest word that can be found?
Every letter must be used at least once, and no other letters can be used.
For example:
taper = repeat · tapper · parapet · pretreat, and many more. But what is the longest word?
taper
heals
brows
often
farce
yowls
satin
awful
iotas
quiet
foils
score
Puzzle 2
Kevin's mother has three children.
The first was called Alpha, the second was called Beta.
What was the name of the third?
Puzzle 3
Can you make this equation correct by moving exactly one matchstick?

Note: this puzzle is not interactive, and the matchsticks cannot be moved. The matchstick layouts for each digit are:
Puzzle 4
During a recent trip to Scotland, I filled my car's 10 gallon fuel tank to the very top.
I travelled at 60 mph up the motorway, and I knew that I averaged exactly 40 miles per gallon.
However, the moment I started, my fuel tank developed a leak, and four hours later I came to a complete stop as I'd run out of fuel!
How much fuel did I lose through the leak?