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Cornerstone · Grades 3–5 Keystones #1 15 January 2016 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 January 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄10 + 6⁄10

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 6x - 12 = 12

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 57 in the ratio 1:2

    Answer: 19 and 38
  5. 5. Statistics Mean

    Calculate the mean of: 10, 46, 47, 36, 48, 29, 16. Give your answer to 2 decimal places

    Answer: 33.14

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