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Cornerstone · Grades 3–5 Keystones #1 6 September 2022 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 September 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄4

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 3x - 19 = 20

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 138 in the ratio 4:1:1

    Answer: 92, 23 and 23
  5. 5. Statistics Mean

    Calculate the mean of: 16, 37, 31, 38, 32, 48, 37, 44

    Answer: 35.4

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