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

Five GCSE retrieval questions · 5 July 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 5⁄7

    Answer: 65⁄42
  2. 2. Algebra Two-step equations

    Solve: 3x + 13 = 34

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

    Calculate the hypotenuse when a = 7cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 8.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 198 in the ratio 3:4:4

    Answer: 54, 72 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 18, 7, 24, 34, 28, 27, 40. Give your answer to 2 decimal places

    Answer: 25.43

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