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Cornerstone · Grades 3–5 Keystones #1 4 January 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 January 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 2⁄3

    Answer: 37⁄24
  2. 2. Algebra Two-step equations

    Solve: 6x + 7 = 79

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 112 in the ratio 3:4

    Answer: 48 and 64
  5. 5. Statistics Mean

    Calculate the mean of: 41, 23, 41, 32, 40, 22, 36. Give your answer to 2 decimal places

    Answer: 33.57

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