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Cornerstone · Grades 3–5 Keystones #1 3 October 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 3 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 5⁄8

    Answer: 19⁄24
  2. 2. Algebra Two-step equations

    Solve: 4x - 13 = 11

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

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

    Divide 136 in the ratio 1:2:1

    Answer: 34, 68 and 34
  5. 5. Statistics Mean

    Calculate the mean of: 23, 41, 39, 24, 9, 9, 24, 39

    Answer: 26

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