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

Five GCSE retrieval questions · 1 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄10 + 1⁄10

    Answer: 1⁄5
  2. 2. Algebra Two-step equations

    Solve: 7x - 13 = 57

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

    Calculate the hypotenuse when a = 5cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 13.93cm
  4. 4. Ratio Sharing in a ratio

    Divide 110 in the ratio 2:2:1

    Answer: 44, 44 and 22
  5. 5. Statistics Mean

    Find the mean of: 20, 11, 15, 10

    Answer: 14

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