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Cornerstone · Grades 3–5 Keystones #1 16 November 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 November 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄4

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x - 7 = 13

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 130 in the ratio 1:3:1

    Answer: 26, 78 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 7, 36, 23, 27, 26, 44

    Answer: 27.2

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