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

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

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 6x - 5 = 79

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

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 75 in the ratio 2:3

    Answer: 30 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 24, 39, 27, 44, 35, 17, 19. Give your answer to 2 decimal places

    Answer: 29.29

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