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Cornerstone · Grades 3–5 Keystones #1 12 September 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 12 September 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄10 + 1⁄10

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 7x + 6 = 62

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 99 in the ratio 1:4:4

    Answer: 11, 44 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 38, 37, 18, 6, 32, 12, 8. Give your answer to 2 decimal places

    Answer: 21.57

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