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Cornerstone · Grades 3–5 Keystones #1 15 December 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 December 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 3⁄5

    Answer: 17⁄20
  2. 2. Algebra Two-step equations

    Solve: 5x + 15 = 45

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 10.44cm
  4. 4. Ratio Sharing in a ratio

    Share 42 in the ratio 1:2

    Answer: 14 and 28
  5. 5. Statistics Mean

    Find the mean of: 16, 18, 5

    Answer: 13

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