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Cornerstone · Grades 3–5 Keystones #1 16 March 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 March 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄9 + 2⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 4x + 13 = 41

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 1:1:2

    Answer: 42, 42 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 36, 44, 47, 32, 49, 20

    Answer: 38

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