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Cornerstone · Grades 3–5 Keystones #1 14 December 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 December 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

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

    Solve: 8x - 19 = 21

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

    Calculate the hypotenuse when a = 4cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 15.52cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 2:1:2

    Answer: 32, 16 and 32
  5. 5. Statistics Mean

    Find the mean of: 17, 13, 20, 6

    Answer: 14