Changing your tires....

Changing your tires....

Posers and Puzzles

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u
The So Fist

Voice of Reason

Joined
28 Mar 06
Moves
9908
22 Oct 12

You notice a strange noise coming from one of your tires as you are driving. You're not sure which tire is making the noise though and a visual inspection doesn't show anything obvious wrong.

You decide to switch the bad tire and replace it with a good tire.

What is the fewest amount of "moves" you could perform to determine the bad tire?

f
Defend the Universe

127.0.0.1

Joined
18 Dec 03
Moves
16687
22 Oct 12

Do you have only a single spare tire?

Joined
26 Apr 03
Moves
26771
22 Oct 12
1 edit

Fewest possible number of moves you *could* perform = 1: You perform the switch, and you are lucky, the sound goes away so you know it is the tyre you took off.

Quiz Master

RHP Arms

Joined
09 Jun 07
Moves
48793
23 Oct 12

Originally posted by uzless
You notice a strange noise coming from one of your tires as you are driving. You're not sure which tire is making the noise though and a visual inspection doesn't show anything obvious wrong.

You decide to switch the bad tire and replace it with a good tire.

What is the fewest amount of "moves" you could perform to determine the bad tire?
With one new tyre you can do it in max of 3 changes.

With two new tyres you can do it in 2 changes.

Already mated

Omaha, Nebraska, USA

Joined
04 Jul 06
Moves
1115042
25 Oct 12

None. Hubby does it.

k
Flexible

The wrong side of 60

Joined
22 Dec 11
Moves
37071
26 Oct 12

Originally posted by wolfgang59
With one new tyre you can do it in max of 3 changes.

With two new tyres you can do it in 2 changes.
"With two new tyres you can do it in 2 changes"

Is that 2*2 or 1*2.

t

Joined
15 Jun 06
Moves
16334
26 Oct 12

Originally posted by wolfgang59
With one new tyre you can do it in max of 3 changes.

With two new tyres you can do it in 2 changes.
You could fix the problem in a max of 2 changes with 2 new tires but would you be able to determine the bad tire?

Quiz Master

RHP Arms

Joined
09 Jun 07
Moves
48793
26 Oct 12

Originally posted by tomtom232
You could fix the problem in a max of 2 changes with 2 new tires but would you be able to determine the bad tire?
1. Change the two front tyres for new.

2a)If noise persists its one of the back ones so just replace with one of the ex-front ones.

2b)If noise has gone its one of the front ones, put one of them onto the back to find out which.

s
Fast and Curious

slatington, pa, usa

Joined
28 Dec 04
Moves
53223
27 Oct 12

Originally posted by wolfgang59
1. Change the two front tyres for new.

2a)If noise persists its one of the back ones so just replace with one of the ex-front ones.

2b)If noise has gone its one of the front ones, put one of them onto the back to find out which.
What if the problem goes away after changing the front two? You still don't know which of the two were bad, you just know the problem went away. It could have an internal defect not visible.

f
Defend the Universe

127.0.0.1

Joined
18 Dec 03
Moves
16687
27 Oct 12

Originally posted by sonhouse
What if the problem goes away after changing the front two? You still don't know which of the two were bad, you just know the problem went away. It could have an internal defect not visible.
In two changes, I think you can either a) identify the bad tire, or b) fix the problem, but not necessarily both.

Dave

S.Yorks.England

Joined
18 Apr 10
Moves
83829
27 Oct 12

Originally posted by uzless
You notice a strange noise coming from one of your tires as you are driving. You're not sure which tire is making the noise though and a visual inspection doesn't show anything obvious wrong.

You decide to switch the bad tire and replace it with a good tire.

What is the fewest amount of "moves" you could perform to determine the bad tire?
1 - assuming you are driving a motor bike

f
Defend the Universe

127.0.0.1

Joined
18 Dec 03
Moves
16687
28 Oct 12

Originally posted by venda
1 - assuming you are driving a motor bike
I approve

Joined
26 Apr 03
Moves
26771
28 Oct 12

Originally posted by venda
1 - assuming you are driving a motor bike
Usually you would be "riding" a motor bike, at least in the uk.

e4

Joined
06 May 08
Moves
42492
29 Oct 12

Even for driving a car only one change is needed to determine the bad tyre.

You do that James Bond trick where you flip the car up on two wheels.
If you cannot hear the noise you know it's one of the tyres n the air.

You change one of those tyres. Drive normally.
If you still hear the noise you have determined which tyre is bad.

It may be possible to do with it no changes by covering each tyre with
a fine powder and driving 50 metres. The tyre makng the noise will
have shaken off the most powder. (I think.)

s
Fast and Curious

slatington, pa, usa

Joined
28 Dec 04
Moves
53223
04 Dec 12

Originally posted by greenpawn34
Even for driving a car only one change is needed to determine the bad tyre.

You do that James Bond trick where you flip the car up on two wheels.
If you cannot hear the noise you know it's one of the tyres n the air.

You change one of those tyres. Drive normally.
If you still hear the noise you have determined which tyre is bad.

It may be poss ...[text shortened]... d driving 50 metres. The tyre makng the noise will
have shaken off the most powder. (I think.)
Alternately, you could drive through a foot deep creek and note which tire is losing air by the bubbles.