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

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

  1. 1. Number Adding fractions

    Add: 1⁄3 + 5⁄7

    Answer: 22⁄21
  2. 2. Algebra Two-step equations

    Solve: 7x - 17 = 88

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 135 in the ratio 4:2:3

    Answer: 60, 30 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 39, 41, 5, 34, 8, 9, 21

    Answer: 22.4

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