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Cornerstone · Grades 3–5 Keystones #1 15 January 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 January 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 4x + 8 = 56

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 13.89cm
  4. 4. Ratio Sharing in a ratio

    Divide 128 in the ratio 4:3:1

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

    Find the mean of: 18, 3, 3, 4, 17

    Answer: 9

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