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Cornerstone · Grades 3–5 Keystones #1 8 May 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 May 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 2⁄3

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 3x - 19 = 11

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

    Calculate the hypotenuse when a = 11cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 17.8cm
  4. 4. Ratio Sharing in a ratio

    Share 68 in the ratio 3:1

    Answer: 51 and 17
  5. 5. Statistics Mean

    Calculate the mean of: 16, 22, 21, 26, 32, 33

    Answer: 25

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