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Cornerstone · Grades 3–5 Keystones #1 8 October 2022 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 October 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄8

    Answer: 17⁄24
  2. 2. Algebra Two-step equations

    Solve: 5x + 12 = 27

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 100 in the ratio 1:4

    Answer: 20 and 80
  5. 5. Statistics Mean

    Calculate the mean of: 23, 41, 49, 7, 18, 11, 37, 39

    Answer: 28.1

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