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Cornerstone · Grades 3–5 Keystones #1 23 May 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 May 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄12 + 1⁄12

    Answer: 1⁄3
  2. 2. Algebra Two-step equations

    Solve: 6x - 18 = 6

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 243 in the ratio 1:4:4

    Answer: 27, 108 and 108
  5. 5. Statistics Mean

    Calculate the mean of: 50, 47, 23, 10, 29, 26, 40. Give your answer to 2 decimal places

    Answer: 32.14

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