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Cornerstone · Grades 3–5 Keystones #1 16 July 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 July 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 1⁄3

    Answer: 17⁄15
  2. 2. Algebra Two-step equations

    Solve: 7x + 15 = 50

    Answer: x = 5
  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 112 in the ratio 4:3

    Answer: 64 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 38, 16, 11, 8, 9, 26, 43. Give your answer to 2 decimal places

    Answer: 21.57

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