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Cornerstone · Grades 3–5 Keystones #1 22 October 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 4⁄5

    Answer: 22⁄15
  2. 2. Algebra Two-step equations

    Solve: 4x + 12 = 32

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 6.71cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 4:3:2

    Answer: 56, 42 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 23, 25, 30, 15, 17, 49

    Answer: 26.5

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