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Cornerstone · Grades 3–5 Keystones #1 25 April 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 25 April 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 1⁄7

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

    Solve: 6x + 15 = 75

    Answer: x = 10
  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

    Divide 80 in the ratio 1:3:1

    Answer: 16, 48 and 16
  5. 5. Statistics Mean

    Calculate the mean of: 25, 31, 13, 41, 32, 50

    Answer: 32

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