Here are the results!
1. Average fuel consumption of my car on the way from my workplace to home, 12 August.7.8 l/100 km.
CTG & Zak McKracken - 8.2Akoss Poo - 7.12
Chulk - 8.7
Duplode - 9.35
Bonzai Joe - 10.7
2. Number of people living in countries with no sea coast.475,818,737.
Akoss Poo - 600,000,000Zak McKracken - 650,000,000
Duplode - 293,000,000
CTG - 666,666,666
Chulk - 250,000,000
Bonzai Joe - 143,657,869
3. Boiling point of water at the lowest sea level pressure ever recorded.The lowest pressure was 870 hPa in a typhoon over the Pacific Ocean, 12 October 1979. At this pressure, water boils at
95.8°C.
CTG - 95.01Zak McKracken - 97.2
Duplode - 99.3
Bonzai Joe - 92.2
Akoss Poo - 82.8
Chulk - 150 (

)
4. Distance of the furthest object I've ever seen through a telescope (light years).It is the galaxy M 81, being
12 million light years away.
Akoss Poo - 8,000,000CTG - 6,000,001
Bonzai Joe - 2,300,000 (this would be good for the furthest object visible with naked eye)
Zak McKracken - 342
Chulk - 4.4
Duplode - 2,900,000,000 (more realistic answer than the previous two... a logarithmic scale would have been better for this question)
5. Yearly potato consumption per capita in the United Kingdom, 2005.102 kg.
CTG - 99.9Duplode - 93
Chulk - 150
Bonzai Joe - 34
Zak McKracken - 27
Akoss Poo - 13.48
6. Length of the world's longest straight paved road.It is highway 10 in Saudi Arabia, with a
261 km long straight section.
Duplode - 251CTG - 203
Zak McKracken - 329
Akoss Poo - 22.155
Chulk - 12
Bonzai Joe - 1865
7. Number of goals scored by the champion of the Armenian Premier League (football), 2013/14.The champion was Banants, scoring only
38 goals in 28 games. (The runner-up Shirak scored 48. There are only 8 teams in the top league, playing 4 times with each other.)
Zak McKracken - 42 (our football expert!

)
CTG - 55
Bonzai Joe - 77
Duplode - 82
Akoss Poo - 88
Chulk - 105
8. Total weight of a Trabant 601 Limousine.615 kg.
CTG - 607Zak McKracken - 601
Chulk - 900
Akoss Poo - 1708
Duplode - 1825
Bonzai Joe - 6200 (hey, it's not a lorry!

)
9. Number of matches in the longest undefeated streak in the history of North American professional sport leagues.35, by Philadelphia Flyers (NHL) in 1979-80. Sorry, Mr. Poo!
CTG - 34Akoss Poo & Chulk - 37 & 33
Duplode - 42
Bonzai Joe - 43
Zak McKracken - 22
10. Density of hydrogen cyanide at room temperature (g/cm3).0.687 g/cm3. (It's still liquid, boiling point is 26°C.)
Chulk - 0.753CTG - 0.555
Akoss Poo - 1.123
Zak McKracken - 0.2
Bonzai Joe - 0.0031
Duplode - 0.0019
11. Number of nights I've ever spent in Slovakia.Unfortunately I've never lived in the current territory of Slovakia, and many of my visits there were day trips. So sadly enough, this number is only
21.
CTG - 28Akoss Poo - 6
Zak McKracken - 42
Duplode - 281
Bonzai Joe - 877
Chulk - 1095
12. Length of the longest train ever run in the world (m).7353 m, during a test run in Australia (in 2001).
Chulk - 6000Akoss Poo - 8994
Zak McKracken - 3800
Bonzai Joe - 2140
Duplode - 379
CTG - 28300
13. Heel height of the shoes my wife wore for our wedding (cm).4.0 cm.
Bonzai Joe - 4.75Duplode - 3
Zak McKracken - 6
CTG - 6.9
Akoss Poo - 7.9
Chulk - 10
+1. Minimum speed needed for driving a REAL Corvette ZR1 around a loop with diameter of 30 m.43.2 km/h. The calculation is discussed e.g. here:
http://www.dummies.com/how-to/content/calculate-the-velocity-necessary-to-counteract-gra.html (The type of the car doesn't really matter - only the height of the centre of gravity should be subtracted from the loop radius.)
CTG - 60Duplode - 62
Zak McKracken - 110
Bonzai Joe - 125
Chulk - 175
Akoss Poo - 177
Overall:
1. CaxTheGoogleMaster 72. Zak McKracken 2 (3 second, 5 third places)
3. Akoss Poo 2 (3 second, 2 third places)
4. Chulk 2 (2 second, 1 third places)
5. Duplode 1 (3 second places)
6. Bonzai Joe 1 (no second place)