SOF International Mathematics Olympiad (IMO)
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Set D
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2026
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Sample
Express 20/32 in its lowest terms.
Explanation
Explanation
The HCF of 20 and 32 is 4. Dividing numerator and denominator by 4 gives 20/32 = 5/8, which is in lowest terms since the new numerator and denominator share no common factor other than 1.
PRO TIP
Re-check your working by substituting the answer back into the original question.
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