How binary digits work programming exercises

The following challenges use Blockly, which have been adapted to look like Scratch and contains an interactive editor. To find out the differences, click here. If you like the challenges to be purely in Scratch, then go over to the Scratch tab instead.

Number	Name	Challenge Level
1.1	Display binary numbers (without calculations)	Beginner
1.2	Display Binary Numbers (using a variable)	Beginner
1.3	Display Binary Numbers (using variables as an operator)	Beginner
1.4	Display Binary Numbers (using a variable, operator and a repeat loop)	Beginner
2.1	Display number of dots for a given number of cards	Growing experience
2.2	Display number of dots from right to left in one line	Growing experience
3.1	Display number of dots from the given largest card to 1	Growing experience
4.1	Count dots on 5 black and white cards (without a loop)	Growing experience
4.2	Count dots on 5 black and white cards (using a loop)	Growing experience
4.3	Count dots on 5 black and white cards as one input (without a loop)	Growing experience
4.4	Count dots on 5 black and white cards as one input (using a loop)	Growing experience
4.5	Count dots on any number of black and white cards as one input (using a loop)	Ready to expand
6.1	Display the number of bits needed to represent a number	Ready to expand

Number	Name	Challenge Level
1.1	Display binary numbers (without calculations)	Beginner
1.2	Display Binary Numbers (using a variable)	Beginner
1.3	Display Binary Numbers (using variables as an operator)	Beginner
1.4	Display Binary Numbers (using a variable, operator and a repeat loop)	Beginner
2.1	Display number of dots for a given number of cards	Growing experience
2.2	Display number of dots from right to left in one line	Growing experience
3.1	Display number of dots from the given largest card to 1	Growing experience
4.1	Count dots on 5 black and white cards (without a loop)	Growing experience
4.2	Count dots on 5 black and white cards (using a loop)	Growing experience
4.3	Count dots on 5 black and white cards as one input (without a loop)	Growing experience
4.4	Count dots on 5 black and white cards as one input (using a loop)	Growing experience
4.5	Count dots on any number of black and white cards as one input (using a loop)	Ready to expand
5.1	Display the binary cards needed to represent a given number of dots	Growing experience
5.2	Display the binary cards needed to represent a given number of dots (all in one line)	Growing experience
6.1	Display the number of bits needed to represent a number	Ready to expand
7.1	Display the binary cards needed to represent a decimal number between 0 and 31	Ready to expand
7.2	Display the binary cards needed to represent any decimal number	Ready to expand
7.3	Convert a positive decimal number to a binary number	Ready to expand
7.4	Convert a decimal number to a binary number (alternative method)	Ready to expand
8.1	Binary representation of a decimal number between 0 and 31 by playing musical notes	Ready to expand
8.2	Binary representation of any decimal number by playing musical notes	Ready to expand

Scratch challenges have not been updated to our new plugging it in system. However, you can still access the old content using the links below.

Number	Name	Challenge Level
1.1	Display binary numbers (without calculations)	Beginner
1.2	Display Binary Numbers (using a variable)	Beginner
1.3	Display Binary Numbers (using variables as an operator)	Beginner
1.4	Display Binary Numbers (using a variable, operator and a repeat loop)	Beginner
2.1	Display number of dots for a given number of cards	Growing experience
2.2	Display number of dots from right to left in one line	Growing experience
3.1	Display number of dots from the given largest card to 1	Growing experience
4.1	Count dots on 5 black and white cards (without a loop)	Growing experience
4.2	Count dots on 5 black and white cards (using a loop)	Growing experience
4.3	Count dots on 5 black and white cards as one input (without a loop)	Growing experience
4.4	Count dots on 5 black and white cards as one input (using a loop)	Growing experience
4.5	Count dots on any number of black and white cards as one input (using a loop)	Ready to expand
5.1	Display the binary cards needed to represent a given number of dots	Growing experience
5.2	Display the binary cards needed to represent a given number of dots (all in one line)	Growing experience
6.1	Display the number of bits needed to represent a number	Ready to expand
7.1	Display the binary cards needed to represent a decimal number between 0 and 31	Ready to expand
7.2	Display the binary cards needed to represent any decimal number	Ready to expand
7.3	Convert a positive decimal number to a binary number	Ready to expand
7.4	Convert a decimal number to a binary number (alternative method)	Ready to expand
8.1	Binary representation of a decimal number between 0 and 31 by playing musical notes	Ready to expand
8.2	Binary representation of any decimal number by playing musical notes	Ready to expand
9.1	Display binary cards with dots representing a number between 0 and 31	Ready to expand