English mathematical questions about the UK

The Tower of London was built in 1078. How long has the Tower existed when I turn 50 (2056)?

Britain's flag is based on three different countries' flags. Which?

In 1704, Gibraltar became part of the British Empire. In which sea lies Gibraltar?

The English Channel is as wide as 240 km. I go boat for 30 km/h, how long will the trip take?

1066, England was conquered by a famous french conqueror. But what was his name?

If Britain's surface is 60 times larger than 4000 km2, how big is the UK?

If Britain became an Empire in 1556, and ended up being a 1947, how long was Britain an empire?

If London is 16 times the size of the United Kingdom (240000km2), how big is London?

Ireland was part of Britain for 230 years, founded in 1707. When was Ireland then founded?

Queen Victoria was born in May 1819, and died in January 1901. How old was she?

66 million people live in the UK, 8.25 times as little live in London. How many then?

Britain is one of the three most powerful countries in Western Europe. Which are the other two?

Which of these countries was NOT a British colony?

Britain's highest mountain Ben nevis is 8 times higher than 153m. How high is Ben nevis?

It is 640 kilometers between London & Edinburgh. How long does it take if you travel at 16 km/h