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Cornerstone · Grades 3–5 Keystones #1 9 October 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 1⁄3

    Answer: 23⁄24
  2. 2. Algebra Two-step equations

    Solve: 4x - 5 = 43

    Answer: x = 12
  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 308 in the ratio 4:4:3

    Answer: 112, 112 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 42, 7, 30, 25, 30, 21, 10

    Answer: 23.6

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