Decimal, Binary and Hexadecimal (AQA GCSE Computer Science): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What does a number base (radix) tell us?
What does a number base (radix) tell us?
How many symbols we use to write numbers
How many different symbols does the decimal (base 10) system use?
How many different symbols does the decimal (base 10) system use?
10 symbols (0-9)
In decimal, how much bigger is each column than the previous one (moving right to left)?
In decimal, how much bigger is each column than the previous one (moving right to left)?
10 times bigger
How many symbols does the binary (base 2) system use?
How many symbols does the binary (base 2) system use?
2 symbols: 0 and 1
Why do computers use binary?
Why do computers use binary?
Switches have two states: ON (1) or OFF (0)
What is the decimal value of binary 10010101?
What is the decimal value of binary 10010101?
149
How many symbols does hexadecimal (base 16) use?
How many symbols does hexadecimal (base 16) use?
16 symbols (0-9 and A-F)
In hexadecimal, what decimal value does the letter C represent?
In hexadecimal, what decimal value does the letter C represent?
12
Why do programmers use hexadecimal instead of working directly with binary?
Why do programmers use hexadecimal instead of working directly with binary?
Hex is shorter & easier to read/remember
Which number system produces the longest representation for the same value?
Which number system produces the longest representation for the same value?
Binary
What types of data do computers convert to binary?
What types of data do computers convert to binary?
Numbers, letters, images & sound
Which advantage does hexadecimal provide when working with computer data?
Which advantage does hexadecimal provide when working with computer data?
Reduces the chance of making errors