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Cornerstone · Grades 3–5 Keystones #1 19 December 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 2⁄3

    Answer: 13⁄15
  2. 2. Algebra Two-step equations

    Solve: 6x + 12 = 78

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 16.28cm
  4. 4. Ratio Sharing in a ratio

    Divide 136 in the ratio 1:1:2

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

    Calculate the mean of: 26, 39, 34, 50, 27, 25, 49, 37. Give your answer to 2 decimal places

    Answer: 35.88

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