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Cornerstone · Grades 3–5 Keystones #1 26 September 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 September 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 2⁄3

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

    Solve: 8x - 7 = 33

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 270 in the ratio 4:4:1

    Answer: 120, 120 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 9, 30, 12, 41, 43, 24, 38

    Answer: 28.1

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