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Cornerstone · Grades 3–5 Keystones #1 10 April 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 April 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄9 + 1⁄9

    Answer: 2⁄9
  2. 2. Algebra Two-step equations

    Solve: 7x + 7 = 35

    Answer: x = 4
  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

    Share 18 in the ratio 2:1

    Answer: 12 and 6
  5. 5. Statistics Mean

    Calculate the mean of: 30, 37, 44, 33, 25, 48. Give your answer to 2 decimal places

    Answer: 36.17

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