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Cornerstone · Grades 3–5 Keystones #1 27 August 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 August 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 6⁄7

    Answer: 31⁄28
  2. 2. Algebra Two-step equations

    Solve: 7x + 10 = 66

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

    Calculate the hypotenuse when a = 10cm and b = 9cm. Give your answer to 2 decimal places

    Answer: 13.45cm
  4. 4. Ratio Sharing in a ratio

    Divide 140 in the ratio 3:3:1

    Answer: 60, 60 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 42, 28, 42, 21, 47, 32, 42, 26

    Answer: 35

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