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Paper 01R
Mark Scheme (Results)
Summer 2025
Pearson Edexcel International GCSE
In Mathematics B (4MB1) Paper 01R
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Paper 01R
Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications are awarded by Pearson, the UK’s largest awarding body. We
provide a wide range of qualifications including academic, vocational, occupational and specific
programmes for employers. For further information visit our qualifications websites at
www.edexcel.com or www.btec.co.uk. Alternatively, you can get in touch with us using the
details on our contact us page at www.edexcel.com/contactus.
Pearson: helping people progress, everywhere
Pearson aspires to be the world’s leading learning company. Our aim is to help everyone
progress in their lives through education. We believe in every kind of learning, for all kinds of
people, wherever they are in the world. We’ve been involved in education for over 150 years,
and by working across 70 countries, in 100 languages, we have built an international reputation
for our commitment to high standards and raising achievement through innovation in
education. Find out more about how we can help you and your students at:
www.pearson.com/uk
Summer 2025
Question Paper Log Number P79517A
Publications Code 4MB1_01R_2506_MS
All the material in this publication is copyright
© Pearson Education Ltd 2025
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Paper 01R
General Marking Guidance
• All candidates must receive the same
treatment. Examiners must mark the first candidate in
exactly the same way as they mark the last.
• Mark schemes should be applied positively. Candidates
must be rewarded for what they have shown they can do
rather than penalised for omissions.
• Examiners should mark according to the mark scheme
not according to their perception of where the grade
boundaries may lie.
• There is no ceiling on achievement. All marks on the mark
scheme should be used appropriately.
• All the marks on the mark scheme are designed to be
awarded. Examiners should always award full marks if
deserved, i.e. if the answer matches the mark
scheme. Examiners should also be prepared to award
zero marks if the candidate’s response is not worthy of
credit according to the mark scheme.
• Where some judgement is required, mark schemes will
provide the principles by which marks will be awarded
and exemplification may be limited.
• When examiners are in doubt regarding the application
of the mark scheme to a candidate’s response, the team
leader must be consulted.
• Crossed out work should be marked UNLESS the
candidate has replaced it with an alternative response.
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Paper 01R
• Types of mark
o M marks: method marks
o A marks: accuracy marks – can only be awarded when relevant M
marks have been gained
o B marks: unconditional accuracy marks (independent of M marks)
• Abbreviations
o cao – correct answer only
o cso – correct solution only
o ft – follow through
o isw – ignore subsequent working
o SC - special case
o oe – or equivalent (and appropriate)
o dep – dependent
o indep – independent
o awrt – answer which rounds to
o eeoo – each error or omission
• No working
If no working is shown, then correct answers may score full marks
If no working is shown, then incorrect (even though nearly correct) answers
score no marks.
• With working
If it is clear from the working that the “correct” answer has been obtained
from incorrect working, award 0 marks.
If a candidate misreads a number from the question: e.g. uses 252 instead of
255; follow through their working and deduct 2A marks from any gained
provided the work has not been simplified. (Do not deduct any M marks
gained.)
If there is a choice of methods shown, then award the lowest mark, unless
the subsequent working makes clear the method that has been used
Examiners should send any instance of a suspected misread to review (but
see above for simple misreads).
• Ignoring subsequent work
It is appropriate to ignore subsequent work when the additional work does
not change the answer in a way that is inappropriate for the question: e.g.
incorrect cancelling of a fraction that would otherwise be correct.
It is not appropriate to ignore subsequent work when the additional work
essentially makes the answer incorrect e.g. algebra.
• Parts of questions
Unless allowed by the mark scheme, the marks allocated to one part of the
question CANNOT be awarded to another.
https://www.stuvia.com/dashboard 3/7/2026 https://www.stuvia.com/dashboard
Paper 01R
Mark Scheme (Results)
Summer 2025
Pearson Edexcel International GCSE
In Mathematics B (4MB1) Paper 01R
https://www.stuvia.com/dashboard 3/7/2026 https://www.stuvia.com/dashboard
,https://www.stuvia.com/dashboard Page 2 of 32 https://www.stuvia.com/dashboard
Paper 01R
Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications are awarded by Pearson, the UK’s largest awarding body. We
provide a wide range of qualifications including academic, vocational, occupational and specific
programmes for employers. For further information visit our qualifications websites at
www.edexcel.com or www.btec.co.uk. Alternatively, you can get in touch with us using the
details on our contact us page at www.edexcel.com/contactus.
Pearson: helping people progress, everywhere
Pearson aspires to be the world’s leading learning company. Our aim is to help everyone
progress in their lives through education. We believe in every kind of learning, for all kinds of
people, wherever they are in the world. We’ve been involved in education for over 150 years,
and by working across 70 countries, in 100 languages, we have built an international reputation
for our commitment to high standards and raising achievement through innovation in
education. Find out more about how we can help you and your students at:
www.pearson.com/uk
Summer 2025
Question Paper Log Number P79517A
Publications Code 4MB1_01R_2506_MS
All the material in this publication is copyright
© Pearson Education Ltd 2025
https://www.stuvia.com/dashboard 3/7/2026 https://www.stuvia.com/dashboard
,https://www.stuvia.com/dashboard Page 3 of 32 https://www.stuvia.com/dashboard
Paper 01R
General Marking Guidance
• All candidates must receive the same
treatment. Examiners must mark the first candidate in
exactly the same way as they mark the last.
• Mark schemes should be applied positively. Candidates
must be rewarded for what they have shown they can do
rather than penalised for omissions.
• Examiners should mark according to the mark scheme
not according to their perception of where the grade
boundaries may lie.
• There is no ceiling on achievement. All marks on the mark
scheme should be used appropriately.
• All the marks on the mark scheme are designed to be
awarded. Examiners should always award full marks if
deserved, i.e. if the answer matches the mark
scheme. Examiners should also be prepared to award
zero marks if the candidate’s response is not worthy of
credit according to the mark scheme.
• Where some judgement is required, mark schemes will
provide the principles by which marks will be awarded
and exemplification may be limited.
• When examiners are in doubt regarding the application
of the mark scheme to a candidate’s response, the team
leader must be consulted.
• Crossed out work should be marked UNLESS the
candidate has replaced it with an alternative response.
https://www.stuvia.com/dashboard 3/7/2026 https://www.stuvia.com/dashboard
, https://www.stuvia.com/dashboard Page 4 of 32 https://www.stuvia.com/dashboard
Paper 01R
• Types of mark
o M marks: method marks
o A marks: accuracy marks – can only be awarded when relevant M
marks have been gained
o B marks: unconditional accuracy marks (independent of M marks)
• Abbreviations
o cao – correct answer only
o cso – correct solution only
o ft – follow through
o isw – ignore subsequent working
o SC - special case
o oe – or equivalent (and appropriate)
o dep – dependent
o indep – independent
o awrt – answer which rounds to
o eeoo – each error or omission
• No working
If no working is shown, then correct answers may score full marks
If no working is shown, then incorrect (even though nearly correct) answers
score no marks.
• With working
If it is clear from the working that the “correct” answer has been obtained
from incorrect working, award 0 marks.
If a candidate misreads a number from the question: e.g. uses 252 instead of
255; follow through their working and deduct 2A marks from any gained
provided the work has not been simplified. (Do not deduct any M marks
gained.)
If there is a choice of methods shown, then award the lowest mark, unless
the subsequent working makes clear the method that has been used
Examiners should send any instance of a suspected misread to review (but
see above for simple misreads).
• Ignoring subsequent work
It is appropriate to ignore subsequent work when the additional work does
not change the answer in a way that is inappropriate for the question: e.g.
incorrect cancelling of a fraction that would otherwise be correct.
It is not appropriate to ignore subsequent work when the additional work
essentially makes the answer incorrect e.g. algebra.
• Parts of questions
Unless allowed by the mark scheme, the marks allocated to one part of the
question CANNOT be awarded to another.
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