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Cornerstone · Grades 3–5 Keystones #1 23 January 2023 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 January 2023 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄5

    Answer: 14⁄15
  2. 2. Algebra Two-step equations

    Solve: 5x - 8 = 37

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 28 in the ratio 3:1

    Answer: 21 and 7
  5. 5. Statistics Mean

    Calculate the mean of: 8, 13, 40, 18, 50, 42, 5, 33

    Answer: 26.1

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