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Cornerstone · Grades 3–5 Keystones #1 24 December 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 24 December 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 3⁄4

    Answer: 33⁄28
  2. 2. Algebra Two-step equations

    Solve: 6x - 17 = 55

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 17.03cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 4:1

    Answer: 64 and 16
  5. 5. Statistics Mean

    Calculate the mean of: 12, 13, 35, 48, 26, 20, 43. Give your answer to 2 decimal places

    Answer: 28.14

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