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Cornerstone · Grades 3–5 Keystones #1 17 October 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 17 October 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 3⁄6

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 5x - 15 = 25

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 6.71cm
  4. 4. Ratio Sharing in a ratio

    Divide 210 in the ratio 3:1:3

    Answer: 90, 30 and 90
  5. 5. Statistics Mean

    Find the mean of: 2, 18, 3, 17

    Answer: 10

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