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Cornerstone · Grades 3–5 Keystones #1 4 December 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 5⁄7

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

    Solve: 2x + 6 = 28

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Share 72 in the ratio 2:1

    Answer: 48 and 24
  5. 5. Statistics Mean

    Find the mean of: 2, 4, 12

    Answer: 6

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