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Cornerstone · Grades 3–5 Keystones #1 21 August 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 August 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄12 + 3⁄12

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

    Solve: 5x + 9 = 44

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 64 in the ratio 3:1

    Answer: 48 and 16
  5. 5. Statistics Mean

    Calculate the mean of: 9, 26, 43, 31, 28, 33, 46. Give your answer to 2 decimal places

    Answer: 30.86

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