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Cornerstone · Grades 3–5 Keystones #1 19 November 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 19 November 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 6⁄8

    Answer: 19⁄20
  2. 2. Algebra Two-step equations

    Solve: 7x - 13 = 43

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

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 90 in the ratio 2:2:1

    Answer: 36, 36 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 21, 47, 44, 29, 6, 27

    Answer: 29

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