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Cornerstone · Grades 3–5 Keystones #1 12 March 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 March 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄8 + 1⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 3x - 15 = 9

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 48 in the ratio 1:2

    Answer: 16 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 17, 29, 19, 24, 26, 12, 30. Give your answer to 2 decimal places

    Answer: 22.43

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