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

Five GCSE retrieval questions · 7 December 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 5⁄7

    Answer: 22⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x - 13 = 20

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 13.04cm
  4. 4. Ratio Sharing in a ratio

    Divide 70 in the ratio 3:1:3

    Answer: 30, 10 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 40, 27, 36, 17, 43, 19, 34, 15. Give your answer to 2 decimal places

    Answer: 28.88

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