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Cornerstone · Grades 3–5 Keystones #1 2 November 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 November 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 1⁄3

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 4x - 13 = 11

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 200 in the ratio 2:2:1

    Answer: 80, 80 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 9, 36, 14, 23, 28, 8. Give your answer to 2 decimal places

    Answer: 19.67

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