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Cornerstone · Grades 3–5 Keystones #1 24 December 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 December 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 3⁄7

    Answer: 19⁄28
  2. 2. Algebra Two-step equations

    Solve: 6x + 10 = 64

    Answer: x = 9
  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

    Divide 182 in the ratio 1:4:2

    Answer: 26, 104 and 52
  5. 5. Statistics Mean

    Find the mean of: 17, 2, 9, 20

    Answer: 12

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