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Cornerstone · Grades 3–5 Keystones #1 6 December 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 December 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 5⁄8

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

    Solve: 6x + 8 = 56

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 13cm

    Answer: 17.69cm
  4. 4. Ratio Sharing in a ratio

    Divide 144 in the ratio 3:2:1

    Answer: 72, 48 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 20, 48, 43, 42, 9, 7

    Answer: 28.2

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