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Cornerstone · Grades 3–5 Keystones #1 10 November 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 10 November 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 2x + 15 = 23

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 91 in the ratio 2:1:4

    Answer: 26, 13 and 52
  5. 5. Statistics Mean

    Calculate the mean of: 42, 30, 35, 46, 9, 12, 15, 37

    Answer: 28.3

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