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Cornerstone · Grades 3–5 Keystones #1 31 March 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 March 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 2⁄3

    Answer: 13⁄15
  2. 2. Algebra Two-step equations

    Solve: 7x + 5 = 68

    Answer: x = 9
  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 120 in the ratio 3:4:1

    Answer: 45, 60 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 37, 5, 29, 37, 30, 35, 36. Give your answer to 2 decimal places

    Answer: 29.86

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