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Cornerstone · Grades 3–5 Keystones #1 18 December 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 December 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄8 + 3⁄5

    Answer: 39⁄40
  2. 2. Algebra Two-step equations

    Solve: 6x + 12 = 66

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 10.77cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 1:4

    Answer: 9 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 45, 31, 32, 19, 14, 23, 45, 23

    Answer: 29

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