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Cornerstone · Grades 3–5 Keystones #1 24 January 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 24 January 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 3⁄6

    Answer: 11⁄8
  2. 2. Algebra Two-step equations

    Solve: 4x - 20 = 16

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 10cm

    Answer: 14.87cm
  4. 4. Ratio Sharing in a ratio

    Share 51 in the ratio 2:1

    Answer: 34 and 17
  5. 5. Statistics Mean

    Calculate the mean of: 25, 41, 22, 17, 26, 45, 35, 32

    Answer: 30.4

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