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Cornerstone · Grades 3–5 Keystones #1 8 July 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 July 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 7⁄8

    Answer: 29⁄24
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 57

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 1:3

    Answer: 20 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 26, 13, 7, 17, 35, 33. Give your answer to 2 decimal places

    Answer: 21.83

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