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Cornerstone · Grades 3–5 Keystones #1 23 April 2016 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 April 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄12 + 1⁄12

    Answer: 1⁄4
  2. 2. Algebra Two-step equations

    Solve: 3x - 12 = 0

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 84 in the ratio 2:1

    Answer: 56 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 50, 14, 28, 12, 44, 28, 31, 38. Give your answer to 2 decimal places

    Answer: 30.63

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