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Cornerstone · Grades 3–5 Keystones #1 19 September 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 19 September 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 10⁄12 + 1⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x + 13 = 55

    Answer: x = 6
  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 154 in the ratio 2:4:1

    Answer: 44, 88 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 49, 7, 24, 7, 24, 49, 6, 27. Give your answer to 2 decimal places

    Answer: 24.13

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