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Cornerstone · Grades 3–5 Keystones #1 11 March 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 March 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 4⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 6x + 12 = 78

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 12.37cm
  4. 4. Ratio Sharing in a ratio

    Share 63 in the ratio 3:4

    Answer: 27 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 18, 20, 17, 19, 38, 44, 47

    Answer: 29

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