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Cornerstone · Grades 3–5 Keystones #1 14 March 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 March 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 6⁄7

    Answer: 44⁄35
  2. 2. Algebra Two-step equations

    Solve: 4x - 20 = 40

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 15.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 150 in the ratio 1:4:1

    Answer: 25, 100 and 25
  5. 5. Statistics Mean

    Calculate the mean of: 33, 5, 24, 21, 38, 50, 45. Give your answer to 2 decimal places

    Answer: 30.86

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