Q:

Can the car or the bike travel further?

There is a car and a motor-bike. The car and the bike both have an spare tire. Now, the car has a total of 5 tyres (one spare tire included) and the bike has a total of 3 tires (one spare tire included).
Each tire of the bike and the car will last for 100 KMs. Take the following points into consideration:

The tire will not have any puncture or problem
The tire will rotate only when the vehicle moves.
Assume that petrol/diesel is infinite.
You cannot buy new tire. 
Tires can be changed easily. 
Once a tire has been used for travelling 100 KM, it cannot be used again.

Can the car or the bike travel further?

A:

Is this a trick question? It look just to be a math problem.
Answer:

 The bike can travel further.  

How to travel with bike:

 The bike can travel 150 km = 100 km / 2 * 3 by rotating between its wheels. For each 50 km, two of the three wheels are used, so each wheel it used for two of the intervals.

How to travel with car:

The car can travel 125 km = 100 km / 4 * 5 by using a different four of the five wheels for each of five 25 km segments.

Alternative short argument:

 Alternatively, the spare tire is a +1/4 relative increase in tire-power for the car and a +1/2 for the bike, so the bike wins.

