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Cornerstone · Grades 3–5 Keystones #1 28 May 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 28 May 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄10 + 3⁄10

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 2x + 7 = 15

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 128 in the ratio 4:1:3

    Answer: 64, 16 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 45, 11, 49, 5, 26, 16. Give your answer to 2 decimal places

    Answer: 25.33

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