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Cornerstone · Grades 3–5 Keystones #1 2 March 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 March 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 1⁄6

    Answer: 1⁄3
  2. 2. Algebra Two-step equations

    Solve: 5x - 8 = 22

    Answer: x = 6
  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

    Divide 126 in the ratio 2:1:3

    Answer: 42, 21 and 63
  5. 5. Statistics Mean

    Calculate the mean of: 17, 20, 41, 39, 20, 37, 45. Give your answer to 2 decimal places

    Answer: 31.29

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