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Cornerstone · Grades 3–5 Keystones #1 23 June 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 23 June 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 4⁄5

    Answer: 29⁄30
  2. 2. Algebra Two-step equations

    Solve: 5x + 13 = 28

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 20 in the ratio 1:3

    Answer: 5 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 24, 8, 48, 6, 48, 37, 24, 6

    Answer: 25.1

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