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Cornerstone · Grades 3–5 Keystones #1 17 September 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 September 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄8 + 3⁄8

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

    Solve: 7x + 8 = 50

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 17.49cm
  4. 4. Ratio Sharing in a ratio

    Divide 220 in the ratio 2:1:2

    Answer: 88, 44 and 88
  5. 5. Statistics Mean

    Find the mean of: 12, 9, 18, 13

    Answer: 13

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