What number system do computers use?

• ASCII

• Denary

• Binary

• Decimal

What are the number choices in binary?

• 0 and 1

• 0, 1 and 2

• 0 to 2

• 0 to 9

What is 1 + 1 in binary?

• 10

• 01

• 11

• 2

Computers use electrical signals that are on or ​ (a)   so they have to see everything as a series of ​ (b)   numbers.

• off
• binary
• denary
• static
• in

​ (a)   data that we want a computer to process needs to be converted into binary format.

• All
• Some
• Most
• No

In Binary, the number ​ (a)   represents a transistor being ON and the number ​ (b)   represents a transistor being OFF.

• 1
• 0
• 2
• 10

Binary is a number system that only uses two digits: 1 and 0. All information that is processed by a computer is in the form of a sequence of 1s and 0s. Therefore, all data that we want a computer to process needs to be ​ (a)   into binary.

• converted
• deleted
• duplicated
• appended

People use the ​ (a)   (or decimal) number system in their day-to-day lives. This system has 10 digits that we can use: 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9.

• denary
• binary
• hexadecimal

binary numbers are usually written in blocks of four, separated by a space (eg 0111 1011). In denary, numbers are often written in blocks of three (eg 6 428 721).

• False

• True

What type of number could 10 be?

• Binary

• Denary

• Neither

• Both