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Cornerstone · Grades 3–5 Keystones #1 28 August 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 August 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 4⁄5

    Answer: 67⁄40
  2. 2. Algebra Two-step equations

    Solve: 3x + 9 = 45

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 15.65cm
  4. 4. Ratio Sharing in a ratio

    Divide 102 in the ratio 1:2:3

    Answer: 17, 34 and 51
  5. 5. Statistics Mean

    Calculate the mean of: 48, 23, 9, 8, 9, 35, 40. Give your answer to 2 decimal places

    Answer: 24.57

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