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Cornerstone · Grades 3–5 Keystones #1 4 October 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄10 + 2⁄10

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 7x + 10 = 80

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 136 in the ratio 1:4:3

    Answer: 17, 68 and 51
  5. 5. Statistics Mean

    Calculate the mean of: 37, 23, 22, 12, 14, 26, 8. Give your answer to 2 decimal places

    Answer: 20.29

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