1 What are Binary Numbers?
Watch this short video (5 minutes). It will explain what binary numbers are.
Quick recap
- Computers only understand two values: 0 and 1.
- Each 0 or 1 is called a bit.
- 8 bits together are called a byte.
- Each position has a value: 1, 2, 4, 8, 16, 32, 64, 128.
Try it yourself - Click the bits!
Click each square to switch it between 0 and 1. Watch the number change!
🎯 10 Quick Challenges - Make the Number!
Click the bits to make the target number. The box turns green when you get it right!
Make the number 3
2 Game Time: Binary Bonanza
Time to play! Binary Bonanza will help you convert denary into binary.
How to play
- Watch the teacher's demo first.
- The game has 10 levels - try to reach the highest level you can!
- You will see a denary (normal) number. Click the bits to make the matching binary number.
Reward! The first 5 students to reach the highest level will get a "4" Achievement Point!
3 Binary to Denary
Now we go the other way: from binary to a normal (denary) number.
The trick
Whenever you see a 1, add the place value above it. Ignore the 0s.
Example: 0 0 0 0 1 0 1 1 → 8 + 2 + 1 = 11
Try it - Set a binary number and see the denary value
Click each bit to switch between 0 and 1. The denary number is calculated for you.
🎯 10 Quick Challenges - What's the Denary?
Read the binary number and type the matching denary number. Press Check or hit Enter.
What is 00000010 in denary?
4 Game Time: Cisco Binary Game
Practise converting both ways with the famous Cisco Binary Game!
How to play
- Numbers fall down the screen.
- If a binary number falls, type the matching denary number.
- If a denary number falls, click the bits to make the binary.
- Don't let too many fall off the bottom!
5 Your Turn - Mini Test
Type your answer in each box. Green = correct, Red = try again.