GCSE
COMPUTER SCIENCE
Paper 1 Computational thinking and programming skills – Python merged
with mark scheme
Monday 12 May 2025 Afternoon Time allowed: 2 hours
Materials
• There are no additional materials required for this paper. For Examiner’s Use
• You must not use a calculator.
Instructions Question Mark
• Use black ink or black ball-point pen. Use pencil only for drawing.
• Answer all questions. 1
• You must answer the questions in the spaces provided.
• If you need extra space for your answer(s), use the lined pages at the end of this 2
book. Write the question number against your answer(s).
3
• Do all rough work in this book. Cross through any work you do not want to be
marked.
4
• Questions that require a coded solution must be answered in Python.
• You should assume that all indexing in code starts at 0 unless stated otherwise. 5
Information 6
The total number of marks available for this paper is 90.
7
8–9
10
11
TOTAL
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
for more: tyrionpapers.com
, 2
Do not write
outside the
box
Advice
For the multiple-choice questions, completely fill in the lozenge alongside the appropriate answer.
CORRECT METHOD WRONG METHODS
If you want to change your answer you must cross out your original answer as shown.
If you wish to return to an answer previously crossed out, ring the answer you now wish to select as
shown.
IB/G/Jun25/G4003/E11
Answer all questions.
Figure 1 shows a program written in Python.
0 1
• Line numbers are included but are not part of the program.
Figure 1
1 # Python program
2 a = 1
3 b = 1
4 c = 5
5 while b < c:
6 a = a + a
7 b = b + 1
8 print(a)
0 1 .1
Where is an arithmetic operation first used in the program in Figure 1?
Shade one lozenge.
[1 mark]
A Line number 1 B Line number 5
C Line number 6
D Line number 8
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IB/G/Jun25/8525/1B
, 3
Do not write outside the
box
0 1 .2
Which of the following is a false statement about the program in Figure 1?
Shade one lozenge.
[1 mark]
A This program contains a comment.
B This program uses assignment.
C This program uses concatenation.
D This program uses iteration.
*02*
Turn over ►
for more: tyrionpapers.com
IB/G/Jun25/8525/1B
, 4
Do not write
outside the
box
for more: tyrionpapers.com
IB/G/Jun25/8525/1B
COMPUTER SCIENCE
Paper 1 Computational thinking and programming skills – Python merged
with mark scheme
Monday 12 May 2025 Afternoon Time allowed: 2 hours
Materials
• There are no additional materials required for this paper. For Examiner’s Use
• You must not use a calculator.
Instructions Question Mark
• Use black ink or black ball-point pen. Use pencil only for drawing.
• Answer all questions. 1
• You must answer the questions in the spaces provided.
• If you need extra space for your answer(s), use the lined pages at the end of this 2
book. Write the question number against your answer(s).
3
• Do all rough work in this book. Cross through any work you do not want to be
marked.
4
• Questions that require a coded solution must be answered in Python.
• You should assume that all indexing in code starts at 0 unless stated otherwise. 5
Information 6
The total number of marks available for this paper is 90.
7
8–9
10
11
TOTAL
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
for more: tyrionpapers.com
, 2
Do not write
outside the
box
Advice
For the multiple-choice questions, completely fill in the lozenge alongside the appropriate answer.
CORRECT METHOD WRONG METHODS
If you want to change your answer you must cross out your original answer as shown.
If you wish to return to an answer previously crossed out, ring the answer you now wish to select as
shown.
IB/G/Jun25/G4003/E11
Answer all questions.
Figure 1 shows a program written in Python.
0 1
• Line numbers are included but are not part of the program.
Figure 1
1 # Python program
2 a = 1
3 b = 1
4 c = 5
5 while b < c:
6 a = a + a
7 b = b + 1
8 print(a)
0 1 .1
Where is an arithmetic operation first used in the program in Figure 1?
Shade one lozenge.
[1 mark]
A Line number 1 B Line number 5
C Line number 6
D Line number 8
for more: tyrionpapers.com
IB/G/Jun25/8525/1B
, 3
Do not write outside the
box
0 1 .2
Which of the following is a false statement about the program in Figure 1?
Shade one lozenge.
[1 mark]
A This program contains a comment.
B This program uses assignment.
C This program uses concatenation.
D This program uses iteration.
*02*
Turn over ►
for more: tyrionpapers.com
IB/G/Jun25/8525/1B
, 4
Do not write
outside the
box
for more: tyrionpapers.com
IB/G/Jun25/8525/1B
