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Cornerstone · Grades 3–5 Keystones #1 6 December 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 December 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄4

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x - 12 = 86

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 8.54cm
  4. 4. Ratio Sharing in a ratio

    Share 68 in the ratio 1:3

    Answer: 17 and 51
  5. 5. Statistics Mean

    Calculate the mean of: 42, 30, 16, 6, 46, 26, 6, 18

    Answer: 23.75

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