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

Five GCSE retrieval questions · 1 May 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 2⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 5x + 13 = 38

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 3:3:1

    Answer: 72, 72 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 12, 43, 23, 33, 16, 19. Give your answer to 2 decimal places

    Answer: 24.33

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