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

Five GCSE retrieval questions · 1 December 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 2⁄5

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 3x + 9 = 45

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 63 in the ratio 3:4

    Answer: 27 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 41, 47, 33, 34, 45, 43, 8. Give your answer to 2 decimal places

    Answer: 35.86

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