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Cornerstone · Grades 3–5 Keystones #1 18 October 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 18 October 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄12 + 2⁄12

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x - 12 = 72

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

    Calculate the hypotenuse when a = 8cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 16.12cm
  4. 4. Ratio Sharing in a ratio

    Divide 243 in the ratio 1:4:4

    Answer: 27, 108 and 108
  5. 5. Statistics Mean

    Find the mean of: 3, 15, 12, 20, 15

    Answer: 13

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