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

Five GCSE retrieval questions · 1 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄4

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

    Solve: 3x - 19 = -4

    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

    Share 45 in the ratio 3:2

    Answer: 27 and 18
  5. 5. Statistics Mean

    Find the mean of: 12, 8, 17, 20, 20

    Answer: 15.4

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