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Cornerstone · Grades 3–5 Keystones #1 23 March 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 23 March 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

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

    Solve: 5x + 13 = 43

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 112 in the ratio 2:1:1

    Answer: 56, 28 and 28
  5. 5. Statistics Mean

    Find the mean of: 6, 6, 4, 4, 16

    Answer: 7.2

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