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Cornerstone · Grades 3–5 Keystones #1 18 December 2016 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 December 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 2⁄3

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 4x + 8 = 20

    Answer: x = 3
  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 240 in the ratio 3:3:4

    Answer: 72, 72 and 96
  5. 5. Statistics Mean

    Find the mean of: 12, 9, 24, 15

    Answer: 15

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