AQA Computing AS Level © Nelson Thornes Ltd 2008 2

Chapter 16 Activities

Binary Conversion Cross-Number 1

1 / 2 / 3 / 4

5

/ 6
7 / 8 / 9 / 10
11 / 12 / 13 /

14

/ 15
16 /

17

/ / /
18 / 19
20

Convert denary numbers to binary and binary numbers to denary.

If a number consists of 1s and 0s, assume it is binary. Otherwise assume it is denary.

AQA Computing AS Level © Nelson Thornes Ltd 2008 2

Chapter 16 Activities

Across


1. 254

5. 5

7. 1011

9. 111101

11. 101001

14. 110011

16. 6

20. 131

Down


1. 13

2. 10010
3. 1111000

4. 1100

5. 1010

6. 10000

8. 1110

10. 1111

12. 3

13. 111100

15. 9

17. 4

18. 1010000

19. 11110

AQA Computing AS Level © Nelson Thornes Ltd 2008 2

Section 5.1

Worksheet

Hexadecimal Cross-Number 3

1 / 2 / 3 / 4
5
/ 6
7 / 8 / 9 / 10
11 /

12

/ 13 / 14
/ 15

16

/ 17
/ / /
18 / 19
20

AQA Computing AS Level © Nelson Thornes Ltd 2008 2

Section 5.1

Worksheet

Across

1. hex BE à binary
5. hex 65 à denary
7. binary 00011101 à hex
9. binary 11010001 à hex
11. hex 29 à denary
14. binary 11100001 à hex
16. hex D2 à denary
20. hex 83 à binary

Down

1. hex F à binary
2. denary 26 à hex
3. binary 000111000000 à hex
4. denary 30 à hex
5. binary 00011010 à hex
6. denary 29 à hex
8. binary 11010100 à hex
10. hex 20 minus 2 (in hex)
12. binary 00010010 à hex
13. denary 176 à hex
15. hex F minus 6 (in binary)
17. denary 416 à hex
18. binary 10110000 à hex
19. denary 208 à hex

AQA Computing AS Level © Nelson Thornes Ltd 2008 2

Section 5.1

Worksheet

AQA Computing AS Level © Nelson Thornes Ltd 2008 2