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

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

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄5

    Answer: 13⁄15
  2. 2. Algebra Two-step equations

    Solve: 4x + 7 = 27

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 9cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 1:2:4

    Answer: 12, 24 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 36, 34, 43, 19, 24, 45, 37, 7. Give your answer to 2 decimal places

    Answer: 30.63

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