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Cornerstone · Grades 3–5 Keystones #1 22 December 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 22 December 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 1⁄5

    Answer: 13⁄40
  2. 2. Algebra Two-step equations

    Solve: 7x + 14 = 91

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

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 105 in the ratio 3:3:1

    Answer: 45, 45 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 16, 19, 45, 9, 5, 20, 6. Give your answer to 2 decimal places

    Answer: 17.14

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