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Cornerstone · Grades 3–5 Keystones #1 11 December 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 11 December 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 5⁄6

    Answer: 23⁄24
  2. 2. Algebra Two-step equations

    Solve: 5x - 12 = 18

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 112 in the ratio 1:2:4

    Answer: 16, 32 and 64
  5. 5. Statistics Mean

    Calculate the mean of: 43, 16, 34, 28, 35, 32, 18. Give your answer to 2 decimal places

    Answer: 29.43

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