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Cornerstone · Grades 3–5 Keystones #1 21 August 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 August 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄6

    Answer: 1⁄1
  2. 2. Algebra Two-step equations

    Solve: 3x + 8 = 38

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 32 in the ratio 1:3

    Answer: 8 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 30, 31, 28, 11, 40, 11, 19. Give your answer to 2 decimal places

    Answer: 24.29

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