Quiz for 10 year olds

30. The 3 is in the tens place, so its value is 30.

True. The ones digit is 9. 5 or more rounds up, so 419 becomes 420.

4,259 → 4,295 → 4,925 → 4,952. Compare the thousands first, then the hundreds, then the tens.

690. The ones digit is 5. 5 or more rounds up, so 685 becomes 690.

40. The 4 is in the tens place, so its value is 40.

False. 1/3 of 120 = 40. To find a third, divide by 3: 120 ÷ 3 = 40.

18. Find 1/10 first: 60 ÷ 10 = 6. Then 3 lots of 6 make 18.

9.77. Line up the decimal points: 7.90 + 1.87 = 9.77.

12.71. Line up the decimal points: 8.50 + 4.21 = 12.71.

True or false: This is the flag of Malaysia.

True. It's Malaysia. Malaysia's flag has 14 stripes: one for each of its 13 states and one for the federal government.

Which country's flag is this?

• Peru
• Venezuela
• Colombia
• Ecuador

Venezuela. Angel Falls in Venezuela is the tallest waterfall in the world.

Manila. The Philippines flies its flag with the red stripe on top in times of war.

Kathmandu. Nepal's is the only national flag that doesn't have four sides.

Finland → Ireland → Switzerland → Portugal. In the far north of Finland, inside the Arctic Circle, the summer sun does not set for weeks on end.

Kabul. Afghanistan is landlocked, but a thin strip of it, the Wakhan Corridor, reaches all the way to China.

Germany. Neuschwanstein was built for King Ludwig II of Bavaria from 1869. It helped inspire Disney's Sleeping Beauty Castle.

True or false: This is the flag of Cameroon.

False. It's Madagascar. Madagascar is the natural home of lemurs, and most of its plants and animals are found nowhere else on Earth.

Bratislava. Slovakia became its own country in 1993, when Czechoslovakia split peacefully in two.

Seed. Inside a seed is a tiny new plant, ready to grow.

True. It is a special kind of muscle that keeps working, day and night, your whole life.

Oxygen. Plants release oxygen as they make food from sunlight.

False. Neon is a gas. Neon glows orange-red when electricity runs through it. Its name comes from the Greek for new.

True. Bananas are very slightly radioactive, because a tiny part of their potassium is naturally radioactive. They are totally safe to eat.

Sodium. Salt is sodium chloride. Alone, sodium is a reactive metal and chlorine is a poisonous gas.

The Soviet Union. Sputnik 1's beeping radio signal could be picked up by people all around the world.

Compsognathus → Coelophysis → T. rex → Argentinosaurus. Argentinosaurus weighed as much as several elephants. Compsognathus weighed less than a big dog.

Venus. Venus is farther from the Sun than Mercury, but its thick atmosphere traps heat like a blanket.

Styracosaurus. Styracosaurus had one long horn on its nose and a frill edged with long spikes.

Amphibians. Frogs, toads and newts are amphibians. Their young, such as tadpoles, live in water.

Baryonyx. Ichthyosaurs were sea reptiles shaped like dolphins. They gave birth to live young at sea.

True. Black Death reaches England: 1348. Gutenberg's printing press: around 1440. Gutenberg built his printing press in around 1440. Before presses like his, most books in Europe were copied out by hand.

Magna Carta sealed (1215) → Henry VIII becomes king (1509) → Great Fire of London (1666) → First people on the Moon (1969). People first walked on the Moon in 1969. Neil Armstrong went first. Buzz Aldrin followed him down the ladder about 20 minutes later.

False. Battle of Waterloo: 1815. First World War begins: 1914. The First World War began in 1914. It lasted more than four years and drew in countries from around the world.

17th century (the 1600s). The Gunpowder Plot was foiled in 1605, which is in the 17th century.

False. It was 1876, in the 19th century (the 1800s). Alexander Graham Bell patented it. His first call was to his assistant, Mr Watson, in another room.

20th century (the 1900s). The first person went into space in 1961, which is in the 20th century.

20th century (the 1900s). The Berlin Wall fell in 1989, which is in the 20th century.

past. Past means beyond, or time gone by. Passed is a verb: she passed the test.

False. Lightning has no e. Lightening means making something lighter.

category. Category is cat, then ego, then ry.

advise. Advise is the verb, and its s sounds like a z.

queue. Queue has four vowels in a row, and still sounds just like the letter q.

vehicle. Vehicle has a quiet h after the e, and ends in cle.

True. Twelve becomes twelfth: the v turns into an f.

licence. In British English, licence with a c is the noun. License with an s is the verb.