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Cornerstone · Grades 3–5 Keystones #1 11 September 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 September 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 6⁄8

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x + 14 = 38

    Answer: x = 8
  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

    Divide 112 in the ratio 4:3:1

    Answer: 56, 42 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 40, 11, 17, 34, 24, 46, 24, 38

    Answer: 29.3

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