Hint: It doesn't matter how far it was to Manchester.

Answer: Daniel.

On the way there Kevin drove 90 miles, and on the way back drove the (total distance - 100 miles).
On the way Daniel drove the (total distance - 90 miles), and on the way back drove 100 miles.

So Kevin drove 90 + total - 100 = total - 10.
And Daniel drove total - 90 + 100 = total + 10.

So Daniel drove 20 miles more than Kevin. QED.

Puzzle 403

1 was a race horse
2 was 12
111 race
2112

How does this make sense?

[Ref: ZLXR]

Hint: Try saying the individual digits.

Answer:
One was a race horse,
Two was one too.
One won one race,
Two won one too.

Puzzle 404

Half of zero is still zero. What other number can be halved to make zero?

[Ref: ZBQV]

Hint: This can't be an actual sum, so what could it be?

Answer: Eight.

When written as a digit, 8, the top half is 0, and the bottom half is also 0.

Puzzle 405

Using the BrainTracker grid below, how many words can you find? Each word must contain the central S and no letter can be used twice, however, the letters do not have to be connected. Proper nouns are not allowed, however, plurals are. Can you find the nine letter word?