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Cornerstone · Grades 3–5 Keystones #1 24 March 2016 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 March 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 1⁄3

    Answer: 11⁄24
  2. 2. Algebra Two-step equations

    Solve: 3x + 6 = 27

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

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 210 in the ratio 4:2:1

    Answer: 120, 60 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 23, 32, 5, 41, 11, 8, 45. Give your answer to 2 decimal places

    Answer: 23.57

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