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Cornerstone · Grades 3–5 Keystones #1 12 September 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 12 September 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 2⁄4

    Answer: 11⁄8
  2. 2. Algebra Two-step equations

    Solve: 7x + 9 = 79

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 102 in the ratio 2:1:3

    Answer: 34, 17 and 51
  5. 5. Statistics Mean

    Calculate the mean of: 14, 32, 8, 34, 16, 29. Give your answer to 2 decimal places

    Answer: 22.17

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