Brain Teasers
Mad Ade's Five Tyres
Mad Ade bought a brand new car, a Madadian Kebabolet, with one extra spare tyre. Each tyre can sustain for a maximum of 1200 kms.
If all the tyres were used equally, how far can the car travel?
If all the tyres were used equally, how far can the car travel?
Answer
1500kmsYou would have to rotate the tires every 300kms
Let me demonstrate (distance is that remaining on each tyre in 100 kms)
12--12
12--12
12
rotate tyres after 3
9--9
9--12
9
rotate tyres after 3 (6 cumulative)
6--9
6--9
6
rotate tyres after 3 (9 cumulative)
6--6
3--6
3
rotate tyres after 3 (12 cumulative)
3--3
3--3
0
drive the final 3 to the tyre shop (15 cumulative)
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