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Cornerstone · Grades 3–5 Keystones #1 23 December 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 23 December 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 5⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 7x - 10 = 81

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 14cm

    Answer: 16.12cm
  4. 4. Ratio Sharing in a ratio

    Share 85 in the ratio 2:3

    Answer: 34 and 51
  5. 5. Statistics Mean

    Find the mean of: 18, 5, 5, 8

    Answer: 9

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