Science
English
History & Geography
Maths
Riddles
100

What is the chemical symbol for water?

H₂O

100

What language  device compares two things using "like" or "as"?

similes 

100

In what year did World War I begin?

1914

100

How many degrees in a triangle?

180 degrees

100

What is it that once you take it, you can’t leave it, but you can give it to others and take it back?

A promise.

200

What is the word equation for photosynthesis?

Carbon dioxide + water → glucose + oxygen

200

What is the main theme of An Inspector Calls?

Social responsibility

200

 What does "Cold War" mean?

 A conflict without direct fighting  

200

What comes next in this sequence: 2, 4, 8, 16, __?


 32

200

 

I am a word of letters three, yet, I sound like one letter. What am I?


eye

300

What is the difference between a series and a parallel circuit?

In a series circuit, components share current. In a parallel circuit, each branch gets the full voltage.

300

What is the purpose of a persuasive text?

To convince the reader to agree with a point of view

300

What is the capital city of Scotland?

Edinburgh

300

You’re in a building with 10 floors. You start on the 10th floor. You get off at the 1st floor, then go to the 3rd, then the 5th, and finally back to the 10th. How many floors have you visited?


5 floors.

300

What word can you create by rearranging the letters of "stop"?

post 

400

 What part of the cell contains DNA?

The nucleus

400

What do we call the way a text is organised (e.g. beginning, middle, end)?

Structure

400

What is the name of the sea between the UK and France?

The English Channel

400

I am 5 years older than my sister. In 10 years, I will be twice as old as she is. How old are we now?

A

You are 15, and your sister is 10.

400

I have keys but open no locks. I have space but no room. You can enter, but you can't go inside. What am I?


A keyboard

500

 What is the main function of red blood cells?


 To carry oxygen


500

Rewrite this sentence in the passive voice: "The dog bit the man."

The man was bitten by the dog.

500

What is the longest river in the UK?

The River Severn

500

What number comes next in this sequence: 1, 4, 9, 16, 25, ___?


 36

500

I am a word of five letters. Remove one letter, and I am a word of four. Remove two, and I am a word of three. Remove three, and I am a word of two. Remove all five, and I am still a word. What am I?


 "Stone"