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Cornerstone · Grades 3–5 Keystones #1 8 April 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 April 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 4⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 8x - 17 = 23

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 108 in the ratio 1:1:4

    Answer: 18, 18 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 20, 47, 27, 18, 49, 14, 13, 48

    Answer: 29.5

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