How do I try a free OCR Combined Science (Gateway / Twenty First Century) question?

Just tap any of the four options on this page — no signup, no card, nothing to install. You'll see the correct answer and a full mark-scheme-style explanation within a second. Each visit shows a fresh randomly-picked question from the live OCR GCSE Combined Science (Gateway / Twenty First Century) bank, so you can keep refreshing to try different ones before deciding whether to create a free account for daily access.

Is Kramizo really free for OCR Combined Science (Gateway / Twenty First Century) students?

Yes — completely free. Every student gets 45 questions a day on the free plan, across any board and any subject, with no card required and no trial countdown. Kramizo's optional Pro plan removes the daily cap and adds analytics, but the free plan is genuinely free forever. We make money from the small percentage of students who choose to upgrade — not from selling data or ads.

Are the Combined Science (Gateway / Twenty First Century) questions aligned to the OCR GCSE syllabus?

Every question is written against the published OCR GCSE Combined Science (Gateway / Twenty First Century) syllabus and reviewed for accuracy before being added to the bank. We match the command words (state, describe, explain, evaluate), mark allocations, and difficulty tier you'll see on real OCR past papers. Explanations are written in the style of official examiner mark schemes so students learn exactly what marks are being awarded for.

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OCR · GCSE · Combined Science (Gateway / Twenty First Century)

One real Combined Science (Gateway / Twenty First Century) question.
No signup. 30 seconds.

Topic: C5: Chemicals of the Natural Environment. Pick an answer — get the mark scheme instantly.

Question · Difficulty 2/3

Gold is found as the metal itself in nature because it is:

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90 questions

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One real Combined Science (Gateway / Twenty First Century) question.No signup. 30 seconds.

One real Combined Science (Gateway / Twenty First Century) question.
No signup. 30 seconds.