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Cornerstone · Grades 3–5 Keystones #1 2 January 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 January 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 2⁄4

    Answer: 17⁄14
  2. 2. Algebra Two-step equations

    Solve: 8x - 15 = 105

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

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

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

    Divide 60 in the ratio 3:2:1

    Answer: 30, 20 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 35, 49, 45, 33, 16, 14, 48, 12

    Answer: 31.5

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