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Cornerstone · Grades 3–5 Keystones #1 21 March 2016 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 March 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 4⁄7

    Answer: 27⁄35
  2. 2. Algebra Two-step equations

    Solve: 4x - 12 = 20

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

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

    Share 30 in the ratio 1:2

    Answer: 10 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 19, 20, 28, 11, 11, 48, 44. Give your answer to 2 decimal places

    Answer: 25.86

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