Introduction to binary

If a binary number ends with a 1, it must be...

• An odd number
• An even number
• A prime number
• The number 12

Tags

CCSS.2.OA.C.3

What is the denary number system?

• It counts the number of dens
• Our usual base 10 number system
• A special number system for computers
• Den Ary's number system

How would you write the number two in binary?

• 1001
• 0001
• 0000
• 0010

Tags

CCSS.2.NBT.A.3

Computers can only understand 0s and 1s.

• True
• False

Binary is made up of which numbers 

• 3 and 4.
• 2 and 3.
• 1 and 2.
• 0 and 1.

How would you write the number 4 in binary code?

• 0100
• 0000
• 0001
• 0010

What is the point of binary?

• It represents how computers interpret electrical signals
• Because we like to make you do extra maths ;-D
• For the lulz
• Because it describes star systems

What is 1011 in denary?

• 11
• 14
• 26
• 1011

What is binary also known as?

• Base 1

• Base 2

• Base 3

• Base 10

Convert 00010001 to decimal

• 17
• 27
• 37
• 47