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

Five GCSE retrieval questions · 1 January 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 6⁄7

    Answer: 32⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x + 9 = 39

    Answer: x = 10
  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

    Share 36 in the ratio 3:1

    Answer: 27 and 9
  5. 5. Statistics Mean

    Calculate the mean of: 10, 25, 50, 35, 36, 44, 29, 40

    Answer: 33.6

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