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Cornerstone · Grades 3–5 Keystones #1 3 May 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 3 May 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 1⁄8

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 6x - 7 = 53

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 78 in the ratio 1:4:1

    Answer: 13, 52 and 13
  5. 5. Statistics Mean

    Find the mean of: 4, 19, 15, 2

    Answer: 10

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