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Cornerstone · Grades 3–5 Keystones #1 15 November 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 November 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 2⁄5

    Answer: 11⁄15
  2. 2. Algebra Two-step equations

    Solve: 5x - 5 = 25

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 7cm

    Answer: 13.04cm
  4. 4. Ratio Sharing in a ratio

    Divide 174 in the ratio 4:1:1

    Answer: 116, 29 and 29
  5. 5. Statistics Mean

    Calculate the mean of: 16, 9, 37, 28, 26, 36, 44, 33

    Answer: 28.6

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