Known as Challenger Deep, what is the maximum depth, in kilometres, of any of Earth's oceans?
11.034 km (9.931 - 12.137)km
Including this year's Championships, how many times have the U.K. failed to win a gold medal?
2 (also Paris 2003)
On 5 June, 2012, which company manufactured its 500,000,000th lighter and celebrated its 80th anniversary?
Zippo
What colour is missing: red, orange, yellow, green, blue, indigo?
Violet
What do fish use to breathe?
Gills
What are lime deposits growing up from the floor of a cave called?
Stalagmites
How many gold medals has the the U.K. won in the history of the Championships?
33 (30 - 36)
Which is the wood of choice for making longbows?
Yew (wych elm also accepted)
Which colours are used to make green?
Yellow and blue
In which American city is the nation's gold bullion depository?
Fort Knox
Here are the first four terms of a number sequence:
2, 5, 11, 23..
Which number comes next?
47
How many separate events (not including heats, semis, etc.) were held during the Championships?
49 (44 - 54)
The 'antipenultimate' best describes which letter of the alphabet?
X
Before the 1950s, Santa Claus was depicted in which coloured suit before Coca-Cola's advertising campaigns popularized the red Santa?
Green
How many sides does a heptadecagon have?
17
Which word can go before Star, Axe and Cat to make three other words?
Pole
After two limited events, the World Athletics Championships were inaugurated in which year?
1983 (1981 - 1985)
Which is the only country in the world beginning with the letter 'Y'?
Yemen
What is the first non-neutral colour that babies see?
Red
By what name is sodium hydroxide better known?
Caustic soda (lye accepted)
If someone had a 'sourire', what would they have?
A smile
What is the capacity of the host Japan National stadium?
68,000 (61,200 - 74,000)
Tanzania is the country that resulted from the union of Tanganyika and which other country in April 1964?
Zanzibar
Which is the most visible colour during the day and can be seen from the furthest distance, making it excellent for warning signs?
Yellow (double points for 'chartreuse')
Which famous 1960s rock band headlined the Glastonbury Festival in 2007?
The Who