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

Five GCSE retrieval questions · 5 January 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 2⁄3

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

    Solve: 7x + 3 = 31

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

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 85 in the ratio 2:3

    Answer: 34 and 51
  5. 5. Statistics Mean

    Calculate the mean of: 13, 28, 36, 10, 10, 29

    Answer: 21

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