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Cornerstone · Grades 3–5 Keystones #1 18 March 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 March 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 6⁄8

    Answer: 5⁄4
  2. 2. Algebra Two-step equations

    Solve: 8x - 10 = 110

    Answer: x = 15
  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

    Divide 182 in the ratio 3:2:2

    Answer: 78, 52 and 52
  5. 5. Statistics Mean

    Calculate the mean of: 8, 20, 22, 45, 14, 41

    Answer: 25

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