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Cornerstone · Grades 3–5 Keystones #1 28 October 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 28 October 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 3⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 6x + 7 = 25

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

    Calculate the hypotenuse when a = 6cm and b = 6cm

    Answer: 8.49cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 2:1:3

    Answer: 42, 21 and 63
  5. 5. Statistics Mean

    Calculate the mean of: 5, 28, 17, 50, 19, 19, 34, 21

    Answer: 24.1

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