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Cornerstone · Grades 3–5 Keystones #1 21 December 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 3⁄8

    Answer: 31⁄40
  2. 2. Algebra Two-step equations

    Solve: 2x - 9 = -1

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

    Calculate the hypotenuse when a = 7cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 9.22cm
  4. 4. Ratio Sharing in a ratio

    Divide 200 in the ratio 3:2:3

    Answer: 75, 50 and 75
  5. 5. Statistics Mean

    Calculate the mean of: 32, 40, 14, 18, 28, 50, 42, 28

    Answer: 31.5

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