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Cornerstone · Grades 3–5 Keystones #1 6 September 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 2⁄6

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x + 4 = 54

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 14.14cm
  4. 4. Ratio Sharing in a ratio

    Divide 170 in the ratio 1:2:2

    Answer: 34, 68 and 68
  5. 5. Statistics Mean

    Find the mean of: 7, 15, 15, 11

    Answer: 12

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