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Cornerstone · Grades 3–5 Keystones #1 2 August 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 August 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 2⁄3

    Answer: 19⁄15
  2. 2. Algebra Two-step equations

    Solve: 6x - 10 = 74

    Answer: x = 14
  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 120 in the ratio 1:1:3

    Answer: 24, 24 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 6, 15, 29, 38, 12, 48, 26. Give your answer to 2 decimal places

    Answer: 24.86

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