Mathematics

Ratio

The most common mistakes Singapore primary students make in Ratio, distilled from 161+ MOE-aligned questions across P6. Free practice at every level.

From the question bank

Top 5 mistakes in Ratio

  1. #1Partial logic

    Unsimplified.

    Seen in 2 questions

  2. #2Misconception

    Reversed order.

    Seen in 2 questions

  3. #3Partial logic

    Took $24 divided by (5 - 3) = 2 to get 1 unit = $12, but then multiplied by 3 (new watch units) instead of 5 (original watch units): 3 x $12 = $36.

    Seen in 1 question

  4. #4Misconception

    Used $24 divided by 3 (the new watch units) = $8 per unit, then multiplied by 5 original watch units: 5 x $8 = $40.

    Seen in 1 question

  5. #5Calc error

    Added the $24 discount to the original watch instead of subtracting; assumed new watch = 5u + $24 = 3u, giving u = -$12 then took absolute value: 6 x $12 = $72.

    Seen in 1 question

Free practice

Practise Ratio by level

Practise every Ratio question — plus 75,000+ across all PSLE topics — with full worked solutions and misconception-specific feedback on Superholic Lab.

Start Free Trial — 7 Days FreeBrowse all PSLE topics →