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0 / 60 seg.
A 4-wheel drive car has travelled 10,000 miles using 5 tyres. All tyres have travelled the same distance. How many miles each tyre has run?
E
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C
H
T
Y
R
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H
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S
T
R
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V
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L
L
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D
8
0
0
0
M
_
L
_
S
.
L
_
T
T
H
_
T
Y
R
_
N
_
M
B
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R
S
B
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1
,
2
,
3
,
4
,
5
T
Y
R
_
1
2
3
4
F
_
R
0
-
2
0
0
0
M
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L
_
S
T
Y
R
_
1
2
3
5
F
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R
2
0
0
0
-
4
0
0
0
M
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L
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S
T
Y
R
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1
2
5
4
F
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R
4
0
0
0
-
6
0
0
0
M
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L
_
S
T
Y
R
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1
5
3
4
F
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R
6
0
0
0
-
8
0
0
0
M
_
L
_
S
T
Y
R
_
5
2
3
4
F
_
R
8
0
0
0
-
1
0
,
0
0
0
M
_
L
_
S
Clue
THE PERSON WAS BORN IN 2005 B.C. (BEFORE CHRIST). THEREFORE, HE WAS 5 YEARS OLD IN 2000 B.C, 10 IN 1995 B.C, AND 15 IN 1990 B.C
THE TRAIN IS ABOUT TO LEAVE AND YOU WILL NOT BE ABLE TO CATCH THE TRAIN. THE AMOUNT OF TIME TAKEN TO TRAVEL TO THE HALFWAY POINT AT 15 MILES AN HOUR IS THE SAME AMOUNT OF TIME TAKEN TO REACH THE TRAIN STATION WHEN TRAVELLING TO THE RAILROAD STATION AT 30 MILES AN HOUR. FOR EXAMPLE, LET'S ASSUME THAT THE DISTANCE TO TRAVEL IS 30 MILES. WHEN TRAVELLING AT 30 MILES AN HOUR, IT TAKES 1 HOUR. WHEN TRAVELLING AT 15 MILES AN HOUR, IT WILL ALREADY TAKE 1 HOUR TO REACH THE HALFWAY POINT
EACH TYRE HAS TRAVELLED 8000 MILES. LET THE TYRE NUMBERS BE 1,2,3,4,5 TYRE 1234 FOR 0-2000 MILES TYRE 1235 FOR 2000-4000 MILES TYRE 1254 FOR 4000-6000 MILES TYRE 1534 FOR 6000-8000 MILES TYRE 5234 FOR 8000-10,000 MILES
THERE IS NO WAY TO GET AN AVERAGE SPEED OF 30 MPH (MILES PER HOUR). IF YOUR AVERAGE SPEED FOR THE 2 MILES STRETCH MUST BE 30 MPH, YOU SHOULD DO IT IN 4 MINUTES. DURING THE ASCENT, YOU WOULD HAVE ALREADY TAKEN 4 MINUTES TO TRAVEL 1 MILE AT 15 MPH. SINCE YOU HAVE TAKEN 4 MINUTES TO GO UP THE HILL, YOU WILL NEED TO TAKE 0 SECONDS TO TRAVEL THE 1 MILE DESCENT IN ORDER TO GET AN AVERAGE SPEED OF 30 MPH. THIS IS NOT POSSIBLE
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