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Cornerstone · Grades 3–5 Keystones #1 5 March 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 5 March 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 2⁄3

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 64

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 78 in the ratio 1:3:2

    Answer: 13, 39 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 45, 25, 15, 8, 44, 40, 32. Give your answer to 2 decimal places

    Answer: 29.86

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