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Cornerstone · Grades 3–5 Keystones #1 22 May 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 May 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 2⁄5

    Answer: 23⁄20
  2. 2. Algebra Two-step equations

    Solve: 6x - 13 = 35

    Answer: x = 8
  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 28 in the ratio 3:1

    Answer: 21 and 7
  5. 5. Statistics Mean

    Calculate the mean of: 14, 41, 24, 7, 10, 49, 36. Give your answer to 2 decimal places

    Answer: 25.86

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