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Cornerstone · Grades 3–5 Keystones #1 21 August 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 August 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 2⁄6

    Answer: 10⁄21
  2. 2. Algebra Two-step equations

    Solve: 4x - 17 = 43

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 9cm. Give your answer to 2 decimal places

    Answer: 9.49cm
  4. 4. Ratio Sharing in a ratio

    Divide 261 in the ratio 3:2:4

    Answer: 87, 58 and 116
  5. 5. Statistics Mean

    Find the mean of: 8, 1, 15

    Answer: 8

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