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Cornerstone · Grades 3–5 Keystones #1 30 August 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 August 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 4⁄7

    Answer: 19⁄21
  2. 2. Algebra Two-step equations

    Solve: 5x + 10 = 60

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 210 in the ratio 2:4:1

    Answer: 60, 120 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 30, 17, 29, 21, 19, 50

    Answer: 27.7

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