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Cornerstone · Grades 3–5 Keystones #1 29 July 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 29 July 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 3⁄5

    Answer: 43⁄30
  2. 2. Algebra Two-step equations

    Solve: 7x + 8 = 50

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 12.65cm
  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: 46, 49, 17, 23, 46, 30, 10, 49

    Answer: 33.75

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