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Cornerstone · Grades 3–5 Keystones #1 23 September 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 September 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄12 + 5⁄12

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 2x + 8 = 24

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 243 in the ratio 2:3:4

    Answer: 54, 81 and 108
  5. 5. Statistics Mean

    Find the mean of: 12, 20, 9, 3

    Answer: 11

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