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Cornerstone · Grades 3–5 Keystones #1 29 January 2018 Skills week 1 of 7
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Five GCSE retrieval questions · 29 January 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 1⁄3

    Answer: 29⁄24
  2. 2. Algebra Two-step equations

    Solve: 2x + 15 = 35

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 153 in the ratio 3:4:2

    Answer: 51, 68 and 34
  5. 5. Statistics Mean

    Find the mean of: 15, 16, 16, 13

    Answer: 15

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