Measurements of data

Computing

Representing information

Representing characters

Binary digits

Numbers in binary

Turing's mug cryptography challenge

In this unit pupils will be introduced to binary digits and how they can be used to represent text and numbers. Pupils will perform conversions between binary and decimal numbers and how binary can be used to represent characters. They will explore how cryptography can be used to protect data.

Data representation: text and numbers

If a file is 2,000 bytes, how many kilobytes is it?

Which statement is correct about the relationship between bits and bytes?

Put these data units in order from smallest to largest:

by creating tiny pits and lands on the surface

How is data stored on an optical disk, such as a CD or DVD?

data is sent from a device to a wireless transmitter

data is converted into radio waves and sent to the receiver

the wireless device receives the radio waves

the device decodes the radio waves back into data

Put these steps in order to show how data is transferred using wireless signals:

What digits are used in the binary number system?

What does each digit in a decimal number represent?

by finding which powers of 2 add up to the number

How do you convert a decimal number to binary?

Which number is written as 101 in binary?

What is the binary representation of the decimal number eight?

Exit Quiz

If a file is 2,000 bytes, how many kilobytes is it?