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Cornerstone · Grades 3–5 Keystones #1 13 October 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄8 + 1⁄8

    Answer: 3⁄8
  2. 2. Algebra Two-step equations

    Solve: 5x - 20 = 50

    Answer: x = 14
  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

    Divide 52 in the ratio 1:1:2

    Answer: 13, 13 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 11, 30, 37, 22, 30, 25, 14, 41

    Answer: 26.3

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