Hexadecimal
Unit 4 Summary - Part 2
Hexadecimal is shorter than a binary.
It only has 0 1 2 3 4 5 6 7 8 9 A B C D E F
A: 10
B: 11
C: 12
D: 13
E: 14
F: 15
1 byte has 8 bits. A nibble has only 4 bits.
(Decimal is also called Denary or Base 10)
Covert hexadecimal to decimal
Covert decimal to hexadecimal
Oxford AQA IGCSE 2019
01.1.
State the hexadecimal representation of the decimal number 194. [2 marks]
Show your working.
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Final answer ____________________________
Answer:
Start creating this table:
Divide 194/16 = 12
put 12 in column 16(sixteens).
Multiply 16*12 = 192, and then 194-192 = 2
put 2 in column 1(units).
Change 12 in column 16(sixteens) into C.
(Because in Hexadecimal, A=10, B=11, C=12, D=13, E=14, F=15.)
So the final answer is C2.
Oxford AQA IGCSE 2020
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01.1.
State the decimal representation of the hexadecimal number A8 Show your working. [2 marks]
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Oxford AQA IGCSE Specimen Paper
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01.2.
Convert the binary number 10011100 to hexadecimal. [1 mark]
Final Answer:
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Answer:
Start creating a binary table:
Convert 10011100 to decimal
10011100 is 156
Then create a hexadecimal table:
Divide 156/16 = 9.75
Put 9 in the column 16
01.3.
State two reasons why programmers often use hexadecimal instead of binary. [2 marks]
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Alternative answers:
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Hexadecimal is easier to read/understand;
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Hexadecimal can be displayed/printed more compactly;
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Less likely to be entered inaccurately;
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Quicker to type in;
Oxford AQA IGCSE Mock Paper
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01.
Figure 1 shows the contents of a byte of memory in binary.
Figure 1
01.2.
State the contents of the byte in Figure 1 in hexadecimal. [1 mark]
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