During a recent trip to Scotland, I filled my petrol tank to the top, a total of 10 gallons.

I travelled at 60 mph up the motorway and I knew that I could average 40 miles per gallon.

However, the moment I started, my petrol tank developed a leak and four hours later I ground to a halt having run out of petrol.

How much petrol had I lost through the leak?

What letter comes next in this sequence:

M V E M J ==?==

Below you will find 15 well-known six letter words, with only their endings remaining.

Can you determine the words?

...rnt
...few
...ryo
...yme
...rak
...urd
...ynx
...mpi
...hom
...ovy
...lpt
...hma
...voy
...web
...mur

You can imagine an arrow in flight, toward a target. For the arrow to reach the target, the arrow must first travel half of the overall distance from the starting point to the target. Next, the arrow must travel half of the remaining distance.

For example, if the starting distance was 10m, the arrow first travels 5m, then 2.5m.

If you extend this concept further, you can imagine the resulting distances getting smaller and smaller. Will the arrow ever reach the target?