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Cornerstone · Grades 3–5 Keystones #1 23 March 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 March 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 2⁄3

    Answer: 23⁄21
  2. 2. Algebra Two-step equations

    Solve: 2x + 7 = 29

    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

    Divide 117 in the ratio 3:4:2

    Answer: 39, 52 and 26
  5. 5. Statistics Mean

    Find the mean of: 4, 19, 13, 14

    Answer: 12.5

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