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Cornerstone · Grades 3–5 Keystones #1 9 January 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 January 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 4⁄8

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

    Solve: 6x + 5 = 23

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

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 72 in the ratio 1:2

    Answer: 24 and 48
  5. 5. Statistics Mean

    Find the mean of: 6, 12, 18, 20

    Answer: 14

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