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Cornerstone · Grades 3–5 Keystones #1 20 December 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 December 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 2⁄5

    Answer: 13⁄20
  2. 2. Algebra Two-step equations

    Solve: 8x - 20 = 36

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 9cm. Give your answer to 2 decimal places

    Answer: 14.21cm
  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: 16, 39, 37, 33, 37, 22, 42, 22

    Answer: 31

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