Question detail

If an alloy is 18 carats, what fraction of the alloy is pure gold?

Try the question, check the answer, then read the explanation to understand the curriculum point.

At a glance

MCQ

Type

practice

Style

Topic

Using materials

Question

3/4

An 18-carat alloy contains 18 parts gold out of 24 total parts, which simplifies to 3/4.

Confusing Carat with Weight

Students often confuse carat, which measures the proportion of gold in an alloy, with the weight of the gold itself.

Clarify that carat refers to the purity of gold in an alloy, expressed as a fraction of 24 parts, rather than the weight of the gold.

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