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Past exam of the computer science course of the University of Cambridge
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Paper 1
2025
110
1
Paper 1
6
a
1
1
Solution
a
b
1
1
Solution
b
c
1
1
Solution
c
2
Paper 1
10
a
2
1
Solution
a
b
2
1
Solution
b
c
2
1
Solution
c
d
2
1
Solution
d
e
2
1
Solution
e
3
Paper 1
8
a
3
5
i
a
1
ii
a
iii
a
1
b
3
1
Solution
b
4
Paper 1
15
a
4
1
Solution
a
b
4
1
Solution
b
c
4
10
i
c
1
ii
c
1
iii
c
1
iv
c
1
v
c
1
5
Paper 1
14
a
5
1
Solution
a
b
5
1
Solution
b
c
5
1
Solution
c
d
5
1
Solution
d
e
5
1
Solution
e
f
5
1
Solution
f
g
5
1
Solution
g
6
Paper 1
16
a
6
1
Solution
a
b
6
1
Solution
b
c
6
1
Solution
c
d
6
1
Solution
d
e
6
1
Solution
e
f
6
1
Solution
f
g
6
1
Solution
g
h
6
1
Solution
h
7
Paper 1
6
a
7
1
Solution
a
b
7
1
Solution
b
c
7
1
Solution
c
8
Paper 1
8
a
8
1
Solution
a
b
8
1
Solution
b
c
8
1
Solution
c
d
8
1
Solution
d
9
Paper 1
4
a
9
1
Solution
a
b
9
1
Solution
b
10
Paper 1
13
a
10
1
Solution
a
b
10
6
i
b
1
ii
b
1
iii
b
1
c
10
1
Solution
c
d
10
1
Solution
d
Paper 2
2025
94
1
Paper 2
8
a
1
4
i
a
1
ii
a
1
b
1
2
i
b
1
2
Paper 2
14
a
2
6
i
a
1
ii
a
1
iii
a
1
b
2
6
i
b
1
ii
b
1
iii
b
1
3
Paper 2
13
a
3
1
Solution
a
b
3
1
Solution
b
c
3
6
i
c
1
ii
c
1
iii
c
1
d
3
1
Solution
d
4
Paper 2
8
a
4
1
Solution
a
b
4
1
Solution
b
c
4
1
Solution
c
d
4
1
Solution
d
5
Paper 2
4
a
5
1
Solution
a
b
5
1
Solution
b
6
Paper 2
6
a
6
1
Solution
a
b
6
1
Solution
b
c
6
1
Solution
c
7
Paper 2
10
a
7
2
i
a
1
b
7
1
Solution
b
c
7
4
i
c
1
ii
c
1
8
Paper 2
9
a
8
4
i
a
1
ii
a
1
b
8
1
Solution
b
c
8
1
Solution
c
9
Paper 2
6
a
9
1
Solution
a
b
9
1
Solution
b
c
9
1
Solution
c
10
Paper 2
6
a
10
1
Solution
a
b
10
1
Solution
b
c
10
1
Solution
c
Paper 3
2025
132
1
Paper 3
7
a
1
1
Solution
a
b
1
1
Solution
b
c
1
2
i
c
1
2
Paper 3
16
a
2
10
i
a
1
ii
a
1
iii
a
1
iv
a
1
v
a
1
b
2
4
i
b
1
ii
b
1
3
Paper 3
10
a
3
1
Solution
a
b
3
1
Solution
b
c
3
1
Solution
c
d
3
1
Solution
d
e
3
1
Solution
e
4
Paper 3
14
a
4
4
i
a
1
ii
a
1
b
4
8
i
b
1
ii
b
1
iii
b
1
iv
b
1
5
Paper 3
10
a
5
1
Solution
a
b
5
1
Solution
b
c
5
1
Solution
c
d
5
1
Solution
d
e
5
1
Solution
e
6
Paper 3
23
a
6
14
i
a
1
ii
a
1
iii
a
1
iv
a
1
v
a
1
vi
a
1
vii
a
1
b
6
1
Solution
b
c
6
1
Solution
c
d
6
1
Solution
d
e
6
1
Solution
e
7
Paper 3
14
a
7
6
i
a
1
ii
a
1
iii
a
1
b
7
1
Solution
b
c
7
4
i
c
1
ii
c
1
8
Paper 3
19
a
8
6
i
a
1
ii
a
1
iii
a
1
b
8
1
Solution
b
c
8
1
Solution
c
d
8
1
Solution
d
e
8
1
Solution
e
f
8
1
Solution
f
g
8
1
Solution
g
9
Paper 3
10
a
9
1
Solution
a
b
9
1
Solution
b
c
9
1
Solution
c
d
9
1
Solution
d
e
9
1
Solution
e
Paper 4
2025
106
1
Paper 4
28
a
1
1
Solution
a
b
1
1
Solution
b
c
1
1
Solution
c
d
1
1
Solution
d
e
1
1
Solution
e
f
1
1
Solution
f
g
1
1
Solution
g
h
1
1
Solution
h
i
1
1
Solution
i
j
1
1
Solution
j
k
1
1
Solution
k
l
1
1
Solution
l
m
1
1
Solution
m
n
1
1
Solution
n
2
Paper 4
15
a
2
1
Solution
a
b
2
1
Solution
b
c
2
1
Solution
c
d
2
8
i
d
1
ii
d
1
iii
d
1
iv
d
1
3
Paper 4
6
a
3
1
Solution
a
b
3
1
Solution
b
c
3
1
Solution
c
4
Paper 4
8
a
4
1
Solution
a
b
4
1
Solution
b
c
4
1
Solution
c
d
4
1
Solution
d
5
Paper 4
8
a
5
1
Solution
a
b
5
1
Solution
b
c
5
1
Solution
c
d
5
1
Solution
d
6
Paper 4
14
a
6
6
i
a
1
ii
a
1
iii
a
1
b
6
6
i
b
1
ii
b
1
iii
b
1
7
Paper 4
8
a
7
1
Solution
a
b
7
1
Solution
b
c
7
1
Solution
c
d
7
1
Solution
d
8
Paper 4
11
a
8
8
i
a
1
ii
a
1
iii
a
1
iv
a
1
b
8
1
Solution
b
Paper 5
2025
78
1
Paper 5
9
a
1
1
Solution
a
b
1
1
Solution
b
c
1
4
i
c
1
ii
c
1
2
Paper 5
9
a
2
1
Solution
a
b
2
1
Solution
b
c
2
4
i
c
1
ii
c
1
3
Paper 5
7
a
3
1
Solution
a
b
3
4
i
b
1
ii
b
1
4
Paper 5
8
a
4
1
Solution
a
b
4
1
Solution
b
c
4
1
Solution
c
d
4
1
Solution
d
5
Paper 5
6
a
5
1
Solution
a
b
5
1
Solution
b
c
5
1
Solution
c
6
Paper 5
11
a
6
8
i
a
1
ii
a
1
iii
a
1
iv
a
1
b
6
1
Solution
b
7
Paper 5
10
a
7
1
Solution
a
b
7
1
Solution
b
c
7
1
Solution
c
d
7
1
Solution
d
e
7
1
Solution
e
8
Paper 5
10
a
8
1
Solution
a
b
8
1
Solution
b
c
8
1
Solution
c
d
8
1
Solution
d
e
8
1
Solution
e
Paper 6
2025
62
1
Paper 6
8
a
1
1
Solution
a
b
1
1
Solution
b
c
1
1
Solution
c
d
1
1
Solution
d
2
Paper 6
6
a
2
1
Solution
a
b
2
1
Solution
b
c
2
1
Solution
c
3
Paper 6
2
a
3
1
Solution
a
4
Paper 6
8
a
4
1
Solution
a
b
4
1
Solution
b
c
4
1
Solution
c
d
4
1
Solution
d
5
Paper 6
7
a
5
2
i
a
1
b
5
1
Solution
b
c
5
1
Solution
c
6
Paper 6
8
a
6
1
Solution
a
b
6
1
Solution
b
c
6
1
Solution
c
d
6
1
Solution
d
7
Paper 6
4
a
7
1
Solution
a
b
7
1
Solution
b
8
Paper 6
4
a
8
1
Solution
a
b
8
1
Solution
b
9
Paper 6
6
a
9
1
Solution
a
b
9
1
Solution
b
c
9
1
Solution
c
Paper 7
2025
153
1
Paper 7
12
a
1
1
Solution
a
b
1
1
Solution
b
c
1
1
Solution
c
d
1
1
Solution
d
e
1
1
Solution
e
f
1
1
Solution
f
2
Paper 7
8
a
2
1
Solution
a
b
2
1
Solution
b
c
2
1
Solution
c
d
2
1
Solution
d
3
Paper 7
8
a
3
1
Solution
a
b
3
1
Solution
b
c
3
1
Solution
c
d
3
1
Solution
d
4
Paper 7
14
a
4
1
Solution
a
b
4
4
i
b
1
ii
b
1
c
4
4
i
c
1
ii
c
1
d
4
1
Solution
d
5
Paper 7
10
a
5
1
Solution
a
b
5
1
Solution
b
c
5
1
Solution
c
d
5
1
Solution
d
e
5
1
Solution
e
6
Paper 7
20
a
6
1
Solution
a
b
6
1
Solution
b
c
6
4
i
c
1
ii
c
1
d
6
8
i
d
1
ii
d
1
iii
d
1
iv
d
1
e
6
1
Solution
e
7
Paper 7
48
a
7
1
Solution
a
b
7
1
Solution
b
c
7
1
Solution
c
d
7
1
Solution
d
e
7
1
Solution
e
f
7
1
Solution
f
g
7
1
Solution
g
h
7
1
Solution
h
i
7
1
Solution
i
j
7
1
Solution
j
k
7
1
Solution
k
l
7
1
Solution
l
m
7
1
Solution
m
n
7
1
Solution
n
o
7
1
Solution
o
p
7
1
Solution
p
q
7
1
Solution
q
r
7
1
Solution
r
s
7
1
Solution
s
t
7
1
Solution
t
u
7
1
Solution
u
v
7
1
Solution
v
w
7
1
Solution
w
x
7
1
Solution
x
8
Paper 7
5
a
8
2
i
a
1
b
8
1
Solution
b
9
Paper 7
8
a
9
1
Solution
a
b
9
1
Solution
b
c
9
1
Solution
c
d
9
1
Solution
d
10
Paper 7
10
a
10
1
Solution
a
b
10
1
Solution
b
c
10
1
Solution
c
d
10
1
Solution
d
e
10
1
Solution
e
Paper 8
2025
140
1
Paper 8
11
a
1
1
Solution
a
b
1
6
i
b
1
ii
b
1
iii
b
1
c
1
1
Solution
c
2
Paper 8
9
a
2
1
Solution
a
b
2
1
Solution
b
c
2
4
i
c
1
ii
c
1
3
Paper 8
12
a
3
1
Solution
a
b
3
1
Solution
b
c
3
1
Solution
c
d
3
1
Solution
d
e
3
1
Solution
e
f
3
1
Solution
f
4
Paper 8
10
a
4
1
Solution
a
b
4
1
Solution
b
c
4
1
Solution
c
d
4
1
Solution
d
e
4
1
Solution
e
5
Paper 8
4
a
5
1
Solution
a
b
5
1
Solution
b
6
Paper 8
10
a
6
1
Solution
a
b
6
1
Solution
b
c
6
1
Solution
c
d
6
1
Solution
d
e
6
1
Solution
e
7
Paper 8
9
a
7
1
Solution
a
b
7
1
Solution
b
c
7
4
i
c
1
ii
c
1
8
Paper 8
8
a
8
1
Solution
a
b
8
1
Solution
b
c
8
1
Solution
c
d
8
1
Solution
d
9
Paper 8
11
a
9
2
3
a
1
b
9
1
Solution
b
c
9
1
Solution
c
d
9
1
Solution
d
e
9
1
Solution
e
10
Paper 8
4
a
10
1
Solution
a
b
10
1
Solution
b
11
Paper 8
12
a
11
1
Solution
a
b
11
1
Solution
b
c
11
1
Solution
c
d
11
1
Solution
d
e
11
1
Solution
e
f
11
1
Solution
f
12
Paper 8
20
a
12
1
Solution
a
b
12
1
Solution
b
c
12
1
Solution
c
d
12
1
Solution
d
e
12
1
Solution
e
f
12
1
Solution
f
g
12
1
Solution
g
h
12
1
Solution
h
i
12
1
Solution
i
j
12
1
Solution
j
13
Paper 8
7
a
13
1
Solution
a
b
13
1
Solution
b
c
13
2
i
c
1
Paper 9
2025
147
1
Paper 9
14
a
1
6
i
a
1
ii
a
1
iii
a
1
b
1
1
Solution
b
c
1
4
i
c
1
ii
c
1
2
Paper 9
1
Solution
2
3
Paper 9
9
a
3
1
Solution
a
b
3
1
Solution
b
c
3
4
i
c
1
ii
c
1
4
Paper 9
4
a
4
1
Solution
a
b
4
1
Solution
b
5
Paper 9
4
a
5
1
Solution
a
b
5
1
Solution
b
6
Paper 9
12
a
6
1
Solution
a
b
6
1
Solution
b
c
6
1
Solution
c
d
6
1
Solution
d
e
6
1
Solution
e
f
6
1
Solution
f
7
Paper 9
5
a
7
1
Solution
a
b
7
2
i
b
1
8
Paper 9
12
a
8
1
Solution
a
b
8
1
Solution
b
c
8
1
Solution
c
d
8
1
Solution
d
e
8
1
Solution
e
f
8
1
Solution
f
9
Paper 9
8
a
9
1
Solution
a
b
9
1
Solution
b
c
9
1
Solution
c
d
9
1
Solution
d
10
Paper 9
4
a
10
1
Solution
a
b
10
1
Solution
b
11
Paper 9
1
Solution
11
12
Paper 9
8
a
12
1
Solution
a
b
12
1
Solution
b
c
12
1
Solution
c
d
12
1
Solution
d
13
Paper 9
52
a
13
8
i
a
1
ii
a
1
iii
a
1
iv
a
1
b
13
2
i
b
1
c
13
1
Solution
c
d
13
1
Solution
d
e
13
1
Solution
e
f
13
1
Solution
f
g
13
1
Solution
g
h
13
1
Solution
h
i
13
1
Solution
i
j
13
1
Solution
j
k
13
1
Solution
k
l
13
1
Solution
l
m
13
1
Solution
m
n
13
1
Solution
n
o
13
1
Solution
o
p
13
1
Solution
p
q
13
1
Solution
q
r
13
1
Solution
r
s
13
1
Solution
s
t
13
1
Solution
t
u
13
1
Solution
u
v
13
1
Solution
v
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Past exam of the computer science course of the University of Cambridge
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