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Cornerstone · Grades 3–5 Keystones #1 18 March 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 March 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 4⁄7

    Answer: 39⁄56
  2. 2. Algebra Two-step equations

    Solve: 6x + 4 = 46

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 3:4:2

    Answer: 42, 56 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 49, 49, 44, 10, 22, 5, 34. Give your answer to 2 decimal places

    Answer: 30.43

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