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Cornerstone · Grades 3–5 Keystones #1 26 January 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 January 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 1⁄3

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

    Solve: 7x - 18 = 24

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 52 in the ratio 1:3

    Answer: 13 and 39
  5. 5. Statistics Mean

    Calculate the mean of: 10, 14, 30, 35, 40, 16. Give your answer to 2 decimal places

    Answer: 24.17

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