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Cornerstone · Grades 3–5 Keystones #1 16 February 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 16 February 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 3⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 4x - 15 = 17

    Answer: x = 8
  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 40 in the ratio 3:2

    Answer: 24 and 16
  5. 5. Statistics Mean

    Calculate the mean of: 10, 10, 10, 41, 45, 31, 25

    Answer: 24.6

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