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Cornerstone · Grades 3–5 Keystones #1 28 September 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 September 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 2⁄3

    Answer: 16⁄15
  2. 2. Algebra Two-step equations

    Solve: 7x + 12 = 89

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

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 2:3

    Answer: 10 and 15
  5. 5. Statistics Mean

    Find the mean of: 17, 13, 6, 4

    Answer: 10

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