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Cornerstone · Grades 3–5 Keystones #1 26 May 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 May 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄8 + 1⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 24

    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

    Share 66 in the ratio 1:2

    Answer: 22 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 28, 49, 10, 50, 40, 16. Give your answer to 2 decimal places

    Answer: 32.17

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